serve. It treats of all the materials and constructions that possibly could be classed under the head of masonry and discusses them in a quite correct manner. It is not, however, specially valuable beyond the class room, because, after the fashion of all books on masonry, it groups together a great number of things which have no particular relation to one another and has therefore to treat each one, on account of the lack of space, in a manner much less complete than the particular subject is treated in books devoted especially to it."- Engineering news-record, April 21, 1921.

Covers materials, including plain and reinforced concrete, and the design of retaining walls, dams, slab and girder bridges, arches, culverts and conduits, and foundations.

Taylor, Stewart. Clay modelling for schools; a suggestive course for teachers of modelling and for students. London and New York: Sir Isaac Pitman & Sons, Ltd., 1921. xii, 139 p. illus. 8°. $2.00. (Pitman's handwork series.) SSM

Practical and well illustrated and arranged by progressive periods in accordance with the usual grading of pupils. Has an excellent chapter on plaster casting.

Terry, C. W. Practical motor body building, a practical treatise on the various branches of motor body construction, for coachbuilders, draughtsmen, designers, students, and others. London: E. & F. N. Spon, Ltd., 1921. viii, 340 p. illus. 8°. 15 s. TON (121)

Apparently this is not a revision of the author's Motor body-building published in 1914. It is regrettable that the physical make-up of the new book is inferior to that of the older with its more attractive size, and better paper. The work, however, is up-todate, covering the preparation of drawings; constructional details of various types of bodies, including those of omnibuses and taxicabs; windscreens; machinery required; painting, trimming and specifications. Thirty-eight illustrations and drawings, including a folding plan for a charabanc designed to carry 30 persons.

Tilden, Sir William A. Famous chemists. The men and their work. London and New York: George Routledge & Sons, Ltd., 1921. xii, 296 p. illus. 8°. 12 s. 6 d.

PKB (118)

"Not only a very convenient book of reference for chemists, but will appeal to general readers who desire to learn the main characteristics and achievements of some of the great men from Boyle to Ramsay who have built up the science of chemistry... Every chemist will find some new facts in this book, and will be pleased to see the old facts so skilfully arranged. Sir William Tilden has made excellent use of his materials, and every picture leaves a brilliant impression on the mind; he brings out the environment in which his heroes worked, and the stimulus they gave to their contemporaries."- Harold B. Dixon in the Journal of the Society of Chemical Industry, June 30, 1921.

Also reviewed in the Analyst, July, 1921, and the Chemical trade journal, May 14, 1921.

Tufford, Henry H. The tire business answered. Minneapolis: Dunwoody Institute Press [cop. 1921]. 471 p. illus. 12°. $2.50. VMV (121) A catechism of raw materials, manufacture, repair and salesmanship. Designed for the experienced tire man as well as for the beginner.

Turner, L. B. Wireless telegraphy and telephony, an outline for electrical engi

neers and others. Cambridge [England]: University Press, 1921. x, 195 p. illus. 8°. £1. TTF (121)

Designed to meet the requirements of a large class of readers occupying an intermediate position between the operator and the wireless specialist, i. e.: that of the electrical engineer who is familiar with electrical theory and mathematics, but who has never studied this particular branch of the subject.

"The book pays the reader the compliment of assuming that he is as well up in the theory of his work as the author in his, and many of the arguments in the analytical portion are condensed and by no means easy to follow. The author sets the pace over a country he knows well, but the reader may find himself forced to stop and think hard at many passages that he is evidently expected to take in his stride. This is perhaps no drawback, but rather the reverse and the book well repays the close attention it demands... It is admirably produced with excellent plates and clear diagrams, and is a valuable addition to the technical library...". -R. ChenevixTrench in The Royal Engineers journal, April, 1921.

Van Deventer, John H., editor. More work per man. Tested and selected methods of managing men... New York: The Engineering Magazine Company, 1921. x, 440 p. charts. 8°. $5.00. TME (228)

A compilation from the periodical Industrial management of articles by various authors. Tells how to pick the man for the job and how to solve the labor turnover problem; training and education of labor; the foreman; employment management and labor maintenance; industrial relations and the shop committee; wage systems and other incentives; the human element in industry; and the reduction of waste and fatigue. Well illustrated with diagrams and forms.

Van Deventer, John H., editor. Planning production for profit. Tested and selected methods of planning production, compiled from Industrial management... New York: The Engineering Magazine Company, 1921. xii, 333 p. illus. $5.00.

TME (228)

Presents in classified form the methods of several successful executives material which would otherwise involve considerable search in the scattered literature of the subject. Covers: organization, stock systems, storekeeping, inventories, time study, instruction and supervision, analysis, planning and coordination, routing, and inspection.

*Vidmar, Milan. Die Transformatoren. Berlin: Julius Springer, 1921. xvi, 702 p. illus. 8°. VGI (121)

"Books on transformers are few and far between, and there has really been no modern up-to-date book on this subject known to all. If ever a book filled a badly felt gap author's name is well known to therefore, it is Vidmar's work on

transformers.

electrical engineers because of a great many practical articles by him which appeared in Austrian and German electrical papers. He is one of a few gifted men who know how to explain in simple words or equations the most intricate physical problems which the designer of electrical apparatus has to face in his daily work. It is a safe assumption that this book would become the companion of every transformer designer if an English translation of it were available." Electrical world, Aug. 13, 1921.

Vivian, E. Charles. A history of aeronautics; with a section on progress in aeroplane design by Lieut.-Col. W. Lockwood Marsh. London: W. Collins Sons & Co. [1921. x, 521 p. illus. 8°. £1. 10 s.

VDT (121)

Traces the development of flight from the legend. ary period to the present time. There are chapters

covering the war period, and the after war development, with emphasis on the progress in design. Sections are devoted to air ships and to engine develop. ment, and there is a short bibliography of aeronau tics. Adapted to the understanding of the general reader.

*Walker, Frank R. The building estimator's reference book, a practical and thoroughly reliable reference book for contractors and estimators engaged in estimating the cost of and constructing all classes of modern buildings; giving the actual labor costs and methods employed in the erection of some of our present-day structures, together with all necessary material and labor quantities entering into the cost of all classes of buildings. Chicago: Frank R. Walker Company, 1921. 2931 p. 4. ed. illus. 12°. $10.00. Desk (121)

"The fact that this book has now gone into its fourth edition proves that it is having wide use. The latest edition is brought up to March 1, 1921, and contains matter of recent interest. The past three or four years, as the author well states, have played havoc with all cost estimates so that it is more than ever necessary to have revisions of such works as this. It is doubtful whether any revision could fully take

*Wall, T. F. Electrical engineering. London: Methuen & Co., Ltd. [cop. 1921. xi, 491 p. illus. 8°. £1.1 s. VGC (121)

Clearly written and well-diagramed work for the advanced student and electrical engineer. Emphasis is laid on static electricity; properties of magnetic shells; Ampere's theorems of the equivalence of electric circuits and magnetic shells; transient currents; alternating-current problems by means of complex quantities; and the relationship between electrostatic, electromagnetic, and practical units. The volume is written from an engineer's point of view, and some knowledge of elementary calculus is necessary.

*Warner, C. A. Field mapping for the oil geologist. New York: John Wiley & Sons, Inc., 1921. x, 145 p. illus. 12°. $2.50. VHY (117)

This small handbook considers only the more important features of field conditions: maps, their value and interpretation; field mapping and methods; instruments, their use and adjustment. A number of tables and geologic sections of several fields are included. Author is field geologist for a large producing company in Oklahoma.