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of the Institute to the meeting of the Association of Inventors and Industrial Artists, held in Paris, December II, 19ol , to present a testimonial to M. Millerand, ex-Minister of Commerce. [The report was acceptecl with the thanks of the Institute. It is printed as an appendix to these minutes.]
In the absence of Mr. Marshall G. Moore, Mining ~ngineer, Cambria Steel Company, Mr. Birkinbine presented his paper on "The Explosion it~ the Roiling Mill Mine of the Cambria Steel Company," at Johnstown, Pa. This disastrous accident happened on July IO, I9O2 , and involved the loss of ii2 human lives. The subsequent investigation of the case demonstrated ' beyond doubt that the explosion was caused by carelessness on the part of some one of the miners in using a naked light, in direct violation of stringent regulations to the contrary. [Mr. Moore's paper is referred for publication.]
Mr. Rufus J. Foster, of Scranton, Pa., followed with a paper giving a historical sketch of the origin and development of" the Miners' Safety Lamp, illustrating the subject by the exhibition and description of a large number Of these devices. The thanks of the meeting were tendered to Mr. Foster for his interesting communication.
Mr. Wilson L. Gill, of New Paltz, New York, read a paper describing" "The School City." "fhis is a system which Mr. Gill has devised for the training Of the children in the schools in the practice Of popular government. The system is in successful operation in many schools throughout the United States and in Cuba. The intention of the speaker is, if possible, to have the plan adopted in the pnblic schools of Philadelphia.
Mr. L. E. Levy spoke in highly commendatory terms of the value of lhe system, and offered the following resolution, which
๐ SIMILAR VOLUMES
Book Notices-Proccerr'inp. ## 77 general results appeared in theJozlrnaZ of this Institute in June, rgoo. By following out these and other lines of work 1 am glad to say that a very marked reduction in the number of hot boxes has been effected in the past few years, in spite of material additions
The Generation of Electric Pressures, Types of Dynamos, The Electric Motor, Efficiencies and Dynamo Calculations, Systems of Electrical Units, Useful Tables and Constants. The author has endeavored to meet the wants of students of electrical engineering by the introduction of numerous--nearly 7oo--