iv PREFACE 



other things, it gives the piece and reference num- 

 bers of each part of the apparatus with special 

 instructions for ordering the apparatus; the 

 weights and dimensions ; the number of sizes in 

 which each piece of apparatus is made, and the 

 particular equipment that each size is to be used 

 with; the construction, operation, and care of the 

 equipment; tables of capacities of reservoirs, and 

 methods of calculation of capacities; tables of 

 capacities of air compressors ; methods of piping 

 two or more compressors to give either greater 

 capacity or greater pressure, and tables of capaci- 

 ties when so piped; tests of apparatus; data of 

 both standing and running tests of trains fitted 

 with the different equipments ; information rela- 

 tive to the air-signal system, and the water-raising 

 system; etc. 



The various tables have been selected with care, 

 and the rules and formulas given are stated sim- 

 ply and concisely, their applications being clearly 

 illustrated by examples and their solutions. 



Care has been exercised to arrange the matter 

 in a convenient and logical manner, and a very- 

 full index increases further the facility with 

 which any subject may be located. 



This handbook was prepared by Mr. J. F. 

 Cosgrove, Dean of the Faculty of the Railway 

 Department. 



INTERNATIONAL CORRESPONDENCE SCHOOLS 



April, 1913 



