*Allen, Alfred Henry. Allen's commercial organic analysis, a treatise on the properties, modes of analysis, and proximate analytic examination of the various organic chemicals and products employed in the arts, manufactures, medicine, etc., with concise methods for the detection and estimation of their impurities, adulterations, and products of decomposition. 5. ed. revised & in part rewritten. v. 1. London: J. & A. Churchill, 1924. viii, 796 p. illus. 8°. $7.50. PMB (119) Standard work brought up to date by the editors and several contributors. Volume 1 covers general methods, alcohols, malt and malt liquors, wines and potable spirits, yeast, neutral alcohol derivatives, sugars, starch, paper and pulp testing, aliphatic acids.

Reviewed in Journal of the Franklin Institute, April, 1924; Engineering world, Feb., 1924; Chemical trade journal, Jan. 11, 1924.

*Arthur, William. The home builders' guide, a treatise for those about to build, covering the selection of the site, the planning of the rooms and proper materials to use in construction. New York: U. P. C. Book Company, 1923. 186 p. illus. 8°. $1.00. VET (121) Tells in a plain way how to build an ordinary house.

Atkins, Evan Arthur. Electric arc and oxy-acetylene welding, a practical handbook for works managers, welding operators, and students. London and New York: Sir Isaac Pitman & Sons, Ltd., 1923. vii, 316 p. illus. 12°. $2.25. VID (117)

Gives results of many tests and experiments, with practical suggestions for manipulation, especially as regards safety. The chapters on metal crystallization and tests are illustrated with numerous microphotographs.

Reviewed in English mechanic, March 7, 1924; World power, March, 1924.

*Austin, Edwin. Developments in power station design, including chapters on pulverized coal, oil fuel, low temperature

carbonisation, waste heat, air heaters, pneumatic coal handling plant, ash handling plant, evaporators, turbo generators, condensing plant, instruments, switchgear, transformers, rectifiers and protective gear. London: Constable & Co.; New York: D. Van Nostrand Co., 1923. xv, 271 p. illus. 4°. $9.00. VFH (121)

Based upon articles which appeared in The Engi neer during 1921 and 1922. Excellent drawings and attractive make-up.

"The latest developments... receive attention; while the fact that the author has collected the information by personal inspection renders the work still more valuable." Mechanical engineer, Feb. 15, 1924.

Also reviewed in Electrical review, London, March 28, 1924.

Belloc, Hilaire. The road. Manchester, England: The British Reinforced Concrete Engineering Co., Ltd., 1923. 218 p. illus. 8°. 15s. VDG (121)

The distinguished author, making no pretensions to technical expertness in road-making, states that his essay is based upon historical reading and experience acquired in the writing of monographs upon the topography of roads of the past. Treats of the road's origin, the overcoming of physical obstacles, political influences, the reaction of roads on the community, the road in history, English roads, Roman roads, roads in the Dark Ages, wheeled traffic and the modern road, and roads of the future.

Deals with special problems and results attained, details of which are scattered among various publications. Intended primarily for engineering students who have some familiarity with motive power machinery in general. "Mathematical treatment of a simple, if at times cumbersome, character has been adopted where it seemed profitable, but in a form which leaves a considerable portion of the book readable by those only interested in results.'

"Of these productions, Mr. Bird's volume is easily the most readable and the most scientific."- Nature, Feb. 23, 1924.

Also reviewed in Nautical magazine, Feb., 1924; Gas and oil power, March 6, 1924.

Blum, William, and G. H. HOGABOOM. Principles of electroplating and electroforming (electrotyping). New York: McGraw-Hill Book Co., Inc., 1924. xii, 356 p. illus. 8°. $4.00. VIK (117)

Designed to assist workers in understanding and applying the results of scientific research in this subject. Sets forth the principles of chemistry, chemical analysis, electricity, and electrochemistry; discusses factors governing the character of the deposits, and the various procedures and equipments. Details for several of the metals and alloys. Authors are respectively chemist and electroplating adviser to the United States Bureau of Mines.

"This book is one for which the plating industries have been waiting.". Metal industry, New York, March, 1924.

Bose, Sir Jagadis Chunder. The physiology of photosynthesis. London and New York: Longmans, Green & Co., 1924. xx, 287 p. illus. 8°. $5.50.

Results of quantitative self-recording experiments by the author on the effect of light upon the growth of plants. Author is the well-known director of the Bose Research Institute, Calcutta.

*Bragg, Sir W. H., and W. L. BRAGG. X rays and crystal structure. London: G. Bell & Sons, Ltd., 1924. xi, 322 p. illus. 4. ed. rev. & enl. 8°. 21s. PWX (117) "For not only have they carried the subject_very much further than its initiators, Drs. Laue, Friedrich, and Knipping, but they have also given us an entirely new mode of experimenting." -From a review of the 1st edition (1915), Nature, April 22, 1915.

"During the last eight years, the subject has been greatly studied and widely extended. The treatises of Dauvillier, Ewald and others are witness to the increase in the ground that has been covered. A large book would be required to treat, in any detail, of all the work that has been done and of the new fields

of research which have been opened up. This new edition does not aim at being such a comprehensive treatise... We have, of course, rewritten most of it... It was best, we have thought, to sketch the main lines of advance and to leave it to everyone interested in following up any special point, to do so by the study of such researches as dealt with it more particularly." Preface.

*Brenchley, Winifred E. Manuring of grass land for hay. London and New York: Longmans, Green & Co., 1924. viii, 146 p. diagrs., tables. 8°. $4.20. VPH

In 1856 Messrs. Lawes and Gilbert laid out experimental plots at Rothamsted, England, in order to study the factors that determine the hay yield, together with the botanical composition and consequent feeding value. Between 1880 and 1900 the results of 20 years manuring were published. Their work has since been carried on without interruption and Miss Brenchley's book indicates the position of affairs at the present time, makes comparisons with the earlier results, and sketches the changes in vegetation induced by varied manurings.

Reviewed in Nature, April 5, 1924.

Browne, Edith A. Vegetable oils. London: A. & C. Black, Ltd., 1924. viii, 88 p. illus. 12°. (Peeps at industries.) 3s. VON (119)

"Popular," with good illustrations. Deals chiefly with the oils of the palm and the ground nut, surrounding the story with interesting local African color. Chapters on the uses, extraction and refining of vegetable oils in general; also on the industries of margarine and soap.

Brownlie, David. Mechanical stoking, a practical treatise on the essentials of machine stoking, and the construction and operation of mechanical stokers, for factory owners and managers, engineers, mechanics, boiler attendants, and students. London and New York: Sir Isaac Pitman & Sons, Ltd., 1923. x, 234 p. illus. 16°. $1.50. VFH (121) Historical introduction is followed by descriptions of makes on the British market. Chapter on the advantages, disadvantages, and methods of working mechanical stokers; also on coal and ash handling. Author writes from a long practical experience. Copiously illustrated.

Reviewed in World power, March, 1924; Mechani cal engineering, March, 1924; Foundry trade journal, Jan. 10, 1924.

Bruce, John. Power station efficiency control, a treatise for the power station engineer on boiler-room efficiency, turbine room efficiency, heat balance control, methods of recording and tabulating operating results and keeping a day to day check on operating efficiency...with an appendix by R. H. Parsons. London and New York: Sir Isaac Pitman & Sons, 1924. xiii, 244 p. illus. 8°. $3.75. VFH (121)

"Not a highly technical treatise, but should be looked upon rather in the nature of a talk to power station operating engineers... The methods...are those which are, or have been, used in the generating stations of the Glasgow Corporation Electricity Department." "- Preface.

Reviewed in World power, May, 1924; Electrical review, London, June 13, 1924.

*Bruttini, Arturo. Uses of waste materials. The collection of waste materials and their uses for human and animal food, in fertilisers, and in certain industries, 1914-1922. London: P. S. King & Son, Ltd., 1923. xx, 367 p. illus. 8°. 12s. VOFB (119)

Issued under the authority of the International Institute of Agriculture, Rome. Deals technically with a surprisingly large number of substitute materials used during the war and afterwards. Copious footnote references.

Bryson, Thomas. Theory and practice of mine ventilation, a text-book for students and a book of reference for managers and under-managers. London: Edward Arnold & Co.; New York: Longmans, Green & Co., 1924. viii, 255 p. illus. 12°. $3.00. VHI (117)

"Insistence on the employment of properly trained persons, qualified by the test of examination, has led to the production of a varied technical literature, to which this work makes a welcome addition... Presents an intelligent theory on which the scheme of mining ventilation can be founded, and exhibits the application of sound scientific principles." — Engineering, May 9, 1924.

Coates, W. A. The choice of switchgear for main- and sub-stations. London: Blackie & Son, Ltd., 1924. 292 p. illus. 8°. 20s. VGM (121)

"Treats the subject...in such a way as to be of maximum assistance to the non-specialist user. Details in regard to construction of apparatus have only been given to a sufficient extent to enable intelligent comparisons to be made by those considering competitive offers." - Preface.

Well illustrated. Chapter on lightning arresters.

*Cohen, Julius B. Organic chemistry for advanced students. London and New York: Longmans, Green & Co., 1923. 3 v. 4. ed. 8°. $6.00 each volume. POB (119)

Part 1, Reactions; Part 2, Structure; Part 3, Synthesis.

New edition includes recent theories and researches. Author and subject index to each volume. Author is Professor of Organic Chemistry in the University of Leeds.

"Brings the data and theoretical considerations drawn from a wide range of compounds under a common head, and thus permits of their discussion from

*The Concrete year book, 1924. A handbook and directory for the concrete industry, edited by Oscar Faber & H. L. Childe. London: Concrete Publications, Ltd., 1924. xiv, 336 p. illus. 8°. 3s. VEO (121)

First part consists of practical information for users- preparation of concrete, surface treatment, concreting in cold weather, fire resistance, floors, roads, tabular data, and a bibliography; followed by directories and catalogues, both of which are largely devoted to British interests.

Reviewed in Concrete and constructional engineering, Feb., 1924..

Cooper, F. J. Textile chemistry; an introduction to the chemistry of the cotton industry. New York: E. P. Dutton & Co., 1924. ix, 235 p. illus. 8°. $5.00.

VLLE (121)

First twelve chapters deal in a simple way with laboratory tools and processes, chemical theory, and briefly with the chief substances used in textile manufacture. Part 2 treats of the natural fibres and their examination; coal, oils, and other chemicals having to do with the machinery; sizing, bleaching and mercerizing. Good drawings of apparatus. Author is connected with The Technical College, Blackburn, England.

Croft, Terrell. Alternating-current_armature winding. New York: McGraw-Hill Book Co., Inc., 1924. ix, 352 p. illus. 8°. $3.00. VGİ (121)

Practical directions for rewinding a machine for the same conditions; reconnecting an existing stator for different conditions; with chapters on unusual connections, testing stator windings for faults, and an unusually large number of diagrams for singlephase, two-phase, and three-phase. A knowledge of arithmetic will suffice as mathematical difficulties have been embodied in convenient tables. The numerous diagrams and drawings are fully equal to the high standard already set by the author. Problems with

answers.

Reviewed in Power, March 18, 1924.

*Cumming, William M., and others. Systematic organic chemistry. Modern methods of preparation and estimation. London: Constable & Co.; New York: D. Van Nostrand Co., 1924. xxii, 535 p. illus. 8°. $6.00. POB (119)

"Conceived on somewhat novel lines, but, though the design is excellent, the execution leaves much to be desired. The errors begin early in the book." Nature, March 15, 1924.

Also reviewed in Journal of the Franklin Institute, June, 1924.

Dean, Reginald Scott. Theoretical metallurgy. New York: John Wiley & Sons, Inc., 1924. vii, 246 p. illus. 8°. $3.00.

VIB (117)

During 1919 the author published a translation of Schenck's Physical chemistry of the metals. Adequate revision, he states, has left very little of the original. Change of title indicates the somewhat broader field. Covers properties of metals, metallic compounds, and metallic alloys; metallurgical processes not involving chemical reaction; processes involving chemical reac tion. Author is chief metallurgist, Hawthorne Works, Western Electric Co.

Reviewed in Engineering world, May, 1924.

Drover, F. J. Marine engineering practice. London: Chapman & Hall, Ltd.; New York: D. Van Nostrand Co., 1924. xiv, 494 p. illus. 8°. $6.50. VXHG (121)

Practical non-mathematical consideration of boilers; oil-fuel burning; reciprocating engines; turbines; condensers and air pumps; auxiliaries; Diesel and semi-Diesel engines; adjustments and repairs. Author is an engineer-commander in the British Navy.

"The book is unquestionably one of the best and most up-to-date works...on the market at the present time, and it should run to at least as many editions as some of its less thorough and less able predecessors." Marine engineer and naval architect, Feb., 1924.

Also reviewed in Shipbuilding and shipping record, Jan. 31, 1924; Mechanical world, Feb. 29, 1924; Nautical magazine, Feb., 1924; Marine engineering, June, 1924.

*Drysdale, C. V., and A. C. JOLLEY. Electrical measuring instruments. Part 1: Commercial and indicating instruments. London: Ernest Benn, Ltd., 1924. 440 p. illus. 8°. 55s. VGK (121)

Detailed information for the designer, constructor, and user. Comparison of various types based upon actual examination, independently of makers' descriptions. Deals with general electrical principles, mechanical design and construction, conditions of rapid indication, elements of theory, properties of electrical materials, permanent magnet moving coil instruments, soft iron instruments, dynamometer-ammeters, voltmeters, watt meters, hot wire instruments, and electrostatic instruments. 377 illustrations and attractive "make-up."

Reviewed in Electrician, April 25, 1924. *Drysdale, C. V., and others. The meLondon: chanical properties of fluids. Blackie & Son, Ltd.; New York: D. Van Nostrand Co., 1923. xiv, 362 p. illus. 8°. $6.00. PCD (117)

Liquids and gases, by Allar Ferguson; Mathematical theory of fluid motion, by Horace Lamb; Viscosity and lubrication, by A. G. M. Michell; Stream-line and turbulent flow, Hydrodynamical resistance, and Phenomena due to the elasticity of a fluid, by A. H. Gibson; The determination of stresses by means of soap films, Wind structure, by A. E. M. Geddes; Submarine signalling and the transmission of sound through water, by C. V. Drysdale.

Reviewed in Engineering, Feb. 29, 1924; Nature, April 12, 1924.

Dunn, J. T. Pulverized and colloidal fuel. London: Ernest Benn, Ltd.; New York: D. Van Nostrand Co., 1924. 197 p. illus. 8°. $6.00. VHW (117)

Descriptions of actual plants, with engineering details; with a discussion of underlying chemical principles, and of advantages and disadvantages. Author has personal acquaintance of a large number of plants, but makes considerable use of published information of others. Attractively printed in large type and well illustrated.

Reviewed in Mechanical engineering, March, 1924; Engineering news-record, March 20, 1924.

Elliott, Ben G. Automobile repairing, a text and reference book on the repair and care of the modern gasoline automobile and its equipment. New York: McGrawHill Book Co., 1924. xii, 431 p. illus. 8°. $3.00. TON (121)

Part I deals with general repair work; Part 11 with shop work and equipment, including welding and cutting.

"Obviously, a book of this nature cannot include specific directions for all makes of cars and all of

the equipment which is used. The method employed, therefore, is to offer instruction on the fundamental principles with sufficient specific application to make the instruction thorough and complete... Not a shop manual nor an encyclopaedia. It is intended primarily for instructional and reference purposes." Preface.

Evans, John W., and G. M. DAVIES. Elementary crystallography. London: Thomas Murby & Co., 1924. vii, 134 p. illus. 8°. 9s. 6d. PWX (117)

"To make the principles...intelligible to those who have only a moderate mathematical training, and especially to afford such information as will assist in the recognition of mineral species."— Preface. Practical exercises at chapter endings. Reviewed in Nature, April 19, 1924.

Feldman, W. M. Biomathematics, being the principles of mathematics for students of biological science. London: Charles Griffin & Co., Ltd., 1923. xix, 398 p. illus. 8°. 21s. QAF

Such portions of simple and higher mathematics as are applicable to biological problems, including statistics, briefly set forth with examples for practice. "The variety of knowledge that the physiologist, for example, has to call to his aid is so vast that he really cannot spare the time to master these textbooks. The present work seems to me to have succeeded in giving just what is likely to be useful." Introduction by Sir William M. Bayliss.

Reviewed in Nature, April 5, 1924.

*Ford, Joseph M. Compressor theory and practice with special reference to the multi-stage machine. London: Constable & Co., Ltd., 1923. xviii, 345 p. illus. 8°. $7.50. VFM (121)

The high compression of gases for use in the chemical industries, naval warfare, etc., has led to an increasing demand for the multi-stage machine. Mr. Ford, who is connected with the Admiralty Research Laboratory, presents a technical treatise for designers and includes illustrations and drawings representing the latest post-war practice.

Fox, Gordon. Principles of electric motors and control. New York: McGrawHill Book Co., Inc., 1924. xiv, 499 p. illus. 8°. $3.50. VGI (121) Does not emphasize principles of design. "Intended for students and for those interested in the selection, application, purchase, sale and use of electric motors and controllers and electric power. The treatment is of simple and practical character and higher mathematics, vector diagrams and similar complications have been avoided. The motors described are those in regular commercial use.' Bibliographies at chapter endings. Has chapters on flywheels, electric motor braking, and electric brakes. 298 illustrations.

Reviewed in Industrial engineer, May, 1924.

Freundlich, Erwin. The theory of relativity. Three lectures for chemists. Translated by Henry L. Brose. London: Methuen & Co., Ltd., 1924. xii, 98 p. 12°. 5s. PAT (117)

"The new exposition seems to me, untrained as mathematician, a very valuable one. The mathematical explanations are of a kind as simple as they are penetrating. A general reader who will take the trouble can at least understand what he is told in simple language. He will probably, if he does, find himself as well off as will at least some mathematicians." · Introduction by Viscount Haldane. Reviewed in Philosophical magazine, April, 1924; Science progress, April, 1924.

Friend, J. Newton, and D. F. TwISS. Oxygen. London: Charles Griffin & Co., Ltd., 1924. xxvi, 370 p. illus. 8°. (A textbook of inorganic chemistry, edited by J. Newton Friend. v. 7, part 1.) 18s. PNB (119)

Contents: General characteristics of the elements of group vi; Oxygen; Physical properties; Chemical properties; Ozone; The atmosphere; Water; Physical properties of water; Chemical properties of water; Composition and molecular complexity of water; Water as a solvent; Water analysis; Hydrogen peroxide.

Gardiner, C. I. Geology. London: illus. John Murray, 1923., 138 p. 12°. (Science for all series.) 3s. 6d. PKP (117) For the beginner. A short account of the work of some of the pioneers; descriptions of the more important minerals and rocks; and a condensed account of fossils and the strata in which they are found. Author is a teacher in Cheltenham College, England.

*Gardner, William. Chemical synonyms and trade names. A dictionary and commercial handbook. London: Crosby Lockwood & Son, 1924. iv, 269 p. 8°. 25s. Desk (119)

"An extremely useful volume, giving in alphabetical order a list of about 14,000 definitions and crossreferences of chemicals and substances used in the chemical and allied industries, particularly alloys, commercial chemicals, drugs, dyestuffs, minerals, explosives, and pigments. The object is to provide a ready-reference book to the chemist and technologist for all the synonyms and trade names in more common use, giving at a glance their chemical constitution." Nature, April 12, 1924.

Also reviewed in Mining journal, Feb. 16, 1924; Journal of the Franklin Institute, June, 1924.

Gibbs, William E. Clouds and smokes. The properties of disperse systems in gases and their practical applications. Foreword by Sir Oliver Lodge. London: J. & A. Churchill; Philadelphia: P. Blakiston's Son & Co., 1924. xiii, 240 p. illus. 8°. $3.00. PLO (118)

Deals with the theory of dust, clouds, mists, haze, fumes and smoke in relation to their dispersion in gases and the atmosphere; also with the various means for their precipitation, including chapters on the industrial treatment of fumes and dusty gases, dust explosions, meteorology, the industrial preparation and utilization of substances in a finely divided condition, and the use of smoke in warfare. Bibliographies at chapter endings.

Reviewed in Engineering world, Feb., 1924.

*Gibson, A. H., and A. E. L. CHORLTON. Modern mechanical engineering, a practical treatise written by specialists. London: Gresham Publishing Co., Ltd., 1923. 6 v. 8°. 84 s. VFC (121)

v. 1: Drawing office organization; pattern-making; foundry work; the machine shop; fitting and erecting of heavy machinery. v. 2: Transport of heavy machinery; pipe-work; applied mechanics; elasticity and strength of materials; testing and properties of materials. V. 3: Hydraulics; modern pumping machinery; fans and air compressors; hydraulic machinery; water turbines; refrigeration. V. 4: Mechanism; machine drawing and design; rivets and riveted joints; applied heat; steam boilers. v. 5: Coal and ash handling plant; engineering chemistry; the reciprocating steam-engine; steam turbines; con

densers and cooling towers; operation of land power plants. v. 6: Gas-engines; oil engines; motor-cars; aero engines; gas producers; operation of oil engines; operation of gas engines.

Reviewed in Engineering, Jan. 25, 1924; Engineer, Feb. 15, 1924; Electrical review, London, April 18, 1924; Marine engineer and naval architect, Feb., 1924.

Ginsbach, J. A. Print shop arithmetic. Peoria, Illinois: The Manual Arts Press [1923). 52 p. illus. 8°. $1.00. * IPB

"To illustrate and apply the use of arithmetic to the common processes and materials of the printing trade as it is taught in school shops." Deals with the point system, type calculations, cutting and cost of stock; comparative weights, costs, etc., of paper; space calculations and job composition.

Goodrich, W. Francis. Pulverized fuel: a practical handbook. London: Charles Griffin & Co.; Philadelphia: J. B. Lippincott Co., 1924. xi, 215 p. illus. 12°. $4.50. VHW (117)

Claiming this fuel as of British origin the author admits that development has been achieved largely by American engineers. Shows results of personal investigations in the United States, France and Great Britain. Discusses design, equipment, and operation of plant; suitable coals; and the future.

Reviewed in Journal of the Franklin Institute, April, 1924; Mining and metallurgy, May, 1924; Mechanical world, April 25, 1924.

The utilisation of low grade and London: Ernest Benn, Ltd., waste fuels. 1924. xix, 368 p. illus. 8°. 42s.

VHV (117) Economy now demands the intelligent use of fuels hitherto regarded as unsatisfactory. Such are lignite, brown coal, peat, town refuse, wood, and low grade and waste coal. Special apparatus has been devised for their profitable consumption and these are described and admirably illustrated in this attractive volume. Chapters on steam boilers, furnaces and firing, boiler house control and equipment, and briquettes and briquetting. Bibliography.

Reviewed in Engineering news-record, March 20, 1924; Mechanical engineering, March, 1924; Gas world, March 15, 1924.

Construction methods for sewage tanks and privies given in detail with many illustrations.

"No book has appeared, so far as the author knows, during the past ten or fifteen years, which covers this field. A few recent books acknowledge the importance of the subject by referring briefly to it. The great number of pamphlets put out by state and governmental agencies interested in health work testifies to the interest in and the importance of the subject. Many of these are very valuable, but nearly all are written to describe or arouse interest in some particular privy or type of sewage treatment plant, with the result that the advantages are stressed and the disadvantages glossed over. This book attempts to state clearly and fairly the best present-day opinion on the various types of privies and methods of sewage disposal." Preface.

Hardy, A. C. Merchant ship types, a survey of the various units engaged in the water transport of people and merchandise, with a foreword by Professor J. J. Welch. London: Chapman & Hall, Ltd., 1924. xi, 316 p. illus. 8°. 15s.

VXHD (121)

Classifies ships according to service; describes and illustrates typical craft, with occasional historical notes. Chapters on icebreakers and train ferries; cable ships, dredgers, tugs and salvage vessels; trawlers and drifters. Appendix has a table of routes; also type silhouettes. Illustrations include several folded plates.

"The author...is a naval architect by profession, and he has written it with the evident idea of helping the tyro over the rough road of first principles... It is a book which is very badly needed, and it gives an enormous mass of information in a remarkably readable form.” — Engineer, April 11, 1924.

Harger, Wilson G. Rural highway pavements, maintenance and reconstruction; a discussion of general principles illustrated by current and recommended practice. New York: McGraw-Hill Book Co., 1924. xvi, 637 p. illus. 8°. $6.00. VDG (121)

A practical detailed treatment of engineering and administrative phases, emphasizing the economies of recognized engineering principles over rigidly standardized and stereotyped design. Gives definite design data, discusses the suitability of different pavements as regards maintenance and costs, with numerous specifications and drawings. Appendix deals with materials and tests.

Reviewed in Engineering news-record, March 20,