11 



Press Opinions. 



'The language used is quite simple, and can he understood by any intelligent person en- 

 gaged in the trades dealt with." The Clarion. 



'This is an appalling book. It shows that there is scarcely a trade or occupation that has 

 not a risk or a danger attached to it." Local Government Journal. 



" Dr. Parry has not only pointed out the ' risks and dangers of various occupations ' ; he has 

 suggested means for their prevention. The work is primarily a practical one." Colliery 

 Manager. _ 



"This is a most useful book which should be in the hands of all employers of labour, 

 foremen, and intelligent workmen, and is one of great utility to sanitary inspectors, and even 

 on occasion to medical men." Health. 



"The writer has succeeded in collecting a large amount of information, and though one 

 could wish he had presented it in a rather more attractive style, he has certainly condensed it 

 into a very small space." Physician and Surgeon. 



-The little book before us is one which will be found exceedingly useful to manufacturers 

 and even factory inspectors. ... No attempt is made to show how diseases when originated 

 are to be cured, but, acting on the sound principle that prevention is better than cure, means 

 are stated how to avoid the harm." Bristol Mercury. 



"The author has endeavoured to treat the question in simple rather than in technical lan- 

 guage, and he has lucidly catalogued the most dangerous trades and their symptoms, and in 

 each case specified the best methods of dealing with them. ... To those for whom the volume 

 is specially designed, Dr. Parry's treatise should be a useful handbook." Sheffield Independent. 



A very useful manual for employers of labour, foremen, intelligent workmen, and, in spite 

 of the author's modesty, for medical men. We have the peculiar risks and dangers of all the 

 dangerous trades carefully described ; the mode of action of various chemicals, etc., used in 

 different industries given, with full directions how to minimise unavoidable risks." Leeds 

 Mercury. 



- Most of the trades in the country are alluded to, and upon those that are dangerous the 

 necessary attention is bestowed, and means are recommended whereby danger may be pre- 

 vented or lessened. The author has evidently studied his subject with care, and has made full 

 use of the experience of others who have had a larger insight into the industries of the country." 

 British Medical Journal. 



"The work is well written and printed, and its verbiage such as to be comprehensible to the 

 workman no less than to the master. The careful and general perusal of a work of this nature 

 cannot but be attended by beneficial results of a far-reaching nature, and we therefore heartily 

 recommend the book to our readers. Medical Officers of Health and Sanitary Inspectors 

 especially should find the work of great interest." Sanitary Record. 



'" It is written in simple language, and its instructions can be easily followed. . . . There 

 are some employers, at any rate, who are more ignorant of, than indifferent to, the slow murder 

 of their workpeople, and if the facts so succinctly set forth in this book were brought to their 

 notice, and if the Trade Unions made it their business to insist on the observance of the better 

 conditions Dr. Parry described, much might be done to lessen the workman's peril." \Veekly 

 Tv'i-es and Echo. 



DRYING BY MEANS OF AIR AND STEAM. Explana- 



tions, Formuhu, and Tables for Use in Practice. Translated from the 

 German of E. HAUSBRAND. T\vo Diagrams and Thirteen Tables. 



[In the Press. 

 Contents. 



Preface. Chapters I., Introduction. II., Estimation of the Maximum Weight of Saturated 

 Aqueous Vapour which can be contained in 1 kilo, of Air at Different Pressure and Tem- 

 peratures. III.. Calculation of the Necessary Weight and Volume of Air, and of the Least 

 Expenditure of Heat, per Drying Apparatus with Heated Air, at the Atmospheric Pressure: 

 A, With the Assumption that the Air is Completely Saturated with Vapour both before Entry 

 and after Exit from the Apparatus. B, When the Atmospheric Air is Completely Saturated 

 before entry, but at its exit is only f, i or Saturated. C, When the Atmospheric Air is not 

 Saturated with Moisture before Entering the Drying Apparatus. IV., Drying Apparatus, in 

 which, in the Drying Chamber, a Pressure is Artificially Created, Higher or Lower than that 

 of the Atmosphere. V., Drying by Means of Superheated Steam, without Air. -VI. , Heating 

 Surface, Velocity of the Air Current, Dimensions of the Drying Room, Surface of the Drying 

 Material, Losses of Heat. 



BONE PRODUCTS AND MANURES. By THOS. LAMBERT. 

 Illustrated by Twenty Plans and Diagrams. [In the Press. 



Contents. 



Analysis of Raw and Finished Products. Skin and Bone Gelatine. Uses and Analysis of 

 Glue, Gelatine, and Size.' Natural and Artificial Manures. Raw Phosphates, Guanos and 

 Guano Phosphates. Mineral Manures. Prepared Nitrogenous Manures. Superphosphates, 

 Special or Mixed Manures. Valuation of Manures. Analysis of Manures, and Tables. 



