SCIENCE-ADVERTISEMENTS 



Ventilation and Humidity in Textile Mills 

 and Factories 



By Cecil H. Lander, M.Sc, A.M.Inst.C.E., Lecturer in Civil Engineering in the 

 University of Manchester. Crown 8vo. $1.40 net (weight, 16 oz.). 



The object of this work is to present an account of the general questions of ventUation and 

 humidification in Textile Mills and Factories considered mainly from the point of view of abating 

 the high temperature to which, notwithstanding the efforts of Owners and Managers, these rooms 

 sometimes attain during hot weather. 



A short account of the various Factory Acts and a general discussion of the subject is given in 

 Chapter I. The principal methods of humidification together with descriptions of various systems 

 in common use, comprise the second Chapter. The remainder of the book is devoted to a considera- 

 tion of the means by which the maximum temperatures in the rooms may be reduced either by 

 modifications in construction, in humidification, or in methods of working. . j 



The Theory of Heat Engines 



By William Inchlet, B.Sc, A.M.LMech.E., Lecturer in Engineering in the Uni- 

 versity College, Nottingham. With 246 Diagrams and numerous examples ; 

 Steam and Mathematical Tables and Index. 8vo. $2.25 net (weight, 36 oz.). 



CATALOGUE OF SCIENCE /V«i4,So\ BOOKS ON REQUEST 



Longmans, Green, & Co. V^^/ 4th Ave. & 30th St., N. Y. 



Jnst Pnblisbed 



Third Mdition, Rewritten 

 Whipple — 



The Microscopy of Drinking Water 



By Geoege C. Whipple, Gordon McKay Professor of Sanitary Engineering, 

 Harvard University. 



xxi -1-409 pages, 6 by 9, 73 figures and 6 plates in the text and 19 full-page 

 plates in colors. Cloth, $4.00 net. 



This book serves as a guide to the water analysis and the water-works engineer, describing the 

 methods of microscopical examination, assisting in the identification of the common microscopic 

 orga,nisms found in drinking water and interpreting the results in the light of environmental studies. 



It is also the purpose of this book to stimulate a greater interest in the study of microscopic 

 aquatic life and general limnology from the practical and economic standpoint. 



JOHN WIUBV & 30INS, Inc., 



432 Fourth Avenue, New York City 



London: Montreal, Can.: 



CHAPMAN & HALL, Limited RENOUF PUBLISHINQ CO. 



