790 EXPERIMENT STATION BECOED. 



" Heating equipment that burns satisfactorily and economically one kint or 

 size of fuel may not be weil adapted to burning another. Ascertain by ex- 

 periment what fuel and what method of using it are best suited to [the] 

 needs. . . . 



"Attend to the fire regularly and try to anticipate the demands for heat. 

 Keep the heat-absorbing surfaces of the heater free from soot and du-t by 

 regular cleaning. Heating systems often fail to meet the demand for heat in 

 severe weather because of insufficient draft. To supply additional heat, the 

 heater must be able to burn more coal. The more probable causes of insuffi- 

 cient draft are chimney not high enough, or having its top too near some tall 

 object; chimney, smoke pipe, or gas passages of heater clogged with soot or 

 debris, sometimes through the breaking of a partition between two flues in a 

 chimney ; leaky connection of smoke pipe to heater or to chimney ; accidental 

 closing of hand damper in smoke pipe; clogging of fuel bed by clinkers; and 

 too great a length of horizontal smoke pipe between the heater and the 

 chimney." 



A list of available publications issued by the Bureau of Mines on fuel tech- 

 nology is included. 



Water supply, plumbing, and sewage disposal for country homes, R. W. 

 Trvllinger (Bicu. Rpt. Kuns. lid. Agr., 19 (lilJ3-J.',), pp. 361-.',1S, figs. 38).— 

 The substance of this article has been noted from another source (E. S. U.. 30, 

 p. 690). 



Sural sanitation, C. A. :\Iagoon {Waxhinpton Sta. Popular Bui. 93 {1915), 

 pp. 60, figs. 30). — This bulletin takes up the subject mainly from the bacteriologi- 

 cal vie\\'point, giving considerable information as to the protection of foods, 

 water supplies, and dairy products, and describing briefly methods of well 

 protection and sewage and garbage disposal. 



A method of treatment of pollutetl farm water supplies with chlorid of lime 

 is outlined as follows : " One tablespoonful of the chlorid of lime is dissolved 

 in 10 qt. of water. This quantity is sufficient to treat 1,000 gal. of water and 

 the operation is carried out by simply pouring the clear solution into the water 

 to be treatetl and stirring thoroughly. This solution is a powerful germicide 

 and its action is very rapid, ten minutes or sc being all the time requinxl to 

 carry out the purification." 



Disposal of human excreta and sewage of the country home, T. Horton 

 {Mo. Bui. N. T. State Dcpt. Health, 31 {1915), ^^os. 8. pp. 237-2.',3, figs. 2: 11. 

 pp. 333-339, figs. 4). — It is stated that as the main requirements a sanitary 

 sewage disposal system for a country home should not be a nuisance, a menace 

 to health, nor the source of an esthetic objection. Its operation should not be 

 affected by freezing weather and it should be convenient. On the basis of these 

 requirements two dry-earth privies, one with a vault and the other with a 

 removable container; two types of cesspools; and a settling tank and tile 

 absorption system, are described and illustrated. 



The disposal of household wastes, W. P. Gerhard {Xew Yoric: D. Van 

 Nostrarul Co., 1915, 3. ed., pp. 195, figs. 4)- — This book discusses the disposal of 

 sewage, garbage, and ashes, chiefly from the farmer's and householder's point 

 of view. 



RURAL ECONOMICS. 



Constructive iniral sociology. .7. M. Gilt.ktte {Xew York: Sfurgi.<( d Walton 

 Co., 1916, 1HW ed., rev. and enl.. pp. XIX+40S, figs. 8). — This is a revised edition 

 of the book previously noted (E. S. R., 28. p. o95). It contains an additional 

 chapter on the physical condition of the United States and agriculture, and a 

 number of new topics under the individual chapters. The material has been 



