so that he may have some idea of when or how to act himself and when to seek expert advice, as well as to enlarge his horizon and perhaps encourage him to further study of law." - Preface.

Reviewed in Engineering news-record, Nov. 15, 1917, p. 940; Boston Society of Civil Engineers. Journal. Dec., 1917. Modern methods of protection against Washington, 1917. 32 p. illus. 8°. (Farm

56. *Covert, Roy N.

lightning.

ers' bulletin 842.)

Economics Div.

The purpose of this bulletin is to displace incorrect or vague ideas about lightning protection. It gives concise, practical information with excellent illustrations, accompanied by specifications for installing equipment so as to secure the greatest degree of protection for the type of installation chosen.

San Francisco:

illus.

57. Dewell, Henry D. Timber framing... Dewey Publishing Co., 1917.

275 p.

Author is a well known structural engineer of the Pacific coast. Valuable data on the strength of the various types of timber joints, as well as on the resistance of spikes, nails, bolts, and screws.

58. *Directory of manufacturers of shoe store specialties, find1917 ed. Chicago: Trade Publications Com96 p.

ings, and leather.

pany [cop. 1917].

12°.

Desk - Tech. Div. Over 250 products are listed with the manufacturers of each arranged alphabetically; also an index to the trade names of a large number of articles. 59. *Gillette, Halbert Powers. grubbing methods and cost. 21., 241 p.

illus. 12°.

Handbook of clearing and New York: Clark Book Co., 1917. Desk-Tech. Div.

Compiled from government bulletins, and periodical literature, as well as from the author's own experience. It covers costs, specifications and different methods, with descriptions of tools and apparatus.

Reviewed in Canadian engineer, Aug. 30, 1917, p. 188; Compressed air magazine, Sept., 1917.

60. *Lang, Harold L., and ANNA H. WHITTELSEY. Removal of stains from clothing and other textiles. Washington, 1917. 8°. (Farmers' bulletin 861.) Economics Div. Gives complete directions for preparing reagents and the manner of their applications to nearly 100 kinds of stains.

35 P.

p.

illus.

61. Snow, Charles Henry. Wood and other organic structural materials. New York: McGraw-Hill Book Co., Inc., 1917. xviii, VEM

478 p.

illus.

8°.

For engineers, architects, technical students, and teachers of manual training. Of its 478 pages, 376 are devoted to wood, its classification, properties, and descriptions of the various species, with chapters on failures and means of preservation. The last three chapters relate to oils, paints, varnishes, adhesives, and india-rubber. Bibliographies, p. 437–445. Author is Dean of the School of Applied Science New York University.

62. Watt, Homer Andrew. The composition of technical papers. New York: McGraw-Hill Book Co., Inc., 1917.

1. ed. 12°.

xiii, VBA

431 p. A text book which aims to teach engineering students to write better technical papers. It is the "result of a teaching experience of several years at the University of Wisconsin, and embodies the methods employed there in a one-semester, three hour course elective for juniors and seniors in the College of Engineering."