190 EXPERIMENT STATION EECOKD. [Vol. as 



to facilitate placing concrete in road work can be effectively removed by this 

 simple expedient." 



Calcium carbid and acetylene, G. G. Pond {Bui. Dept. Chem., Penn. State 

 Col., 1917, S. cd., pp. 139). — This extension report on acetylene gas heating and 

 lighting is the second revision and enlargement of material previously noted 

 (E. S. R., 12, p. 697) and should be of value in a study of rural lighting systems. 



Haymaking machinery, J. R. Bond (Jour. Bd. Agr. [London^, 24 {1911), 

 No. 2, pp. 129-142, figs. 4). — Machines and devices used in England in the mak- 

 ing processes and carrying operations of haymaking are described and illustrated. 



Homemade silos, H. Rabild and K. E. Parks {U. 8. Dept. Agr., Farmers' 

 Bui. 855 {1917), pp. 55, fig.i. 47). — This is a revision of Farmers' Bulletin 589 

 (E. S. R., 31, p. 591.) 



The construction of the wood-hoop silo, J. B. Davidson and J. E. Stiles 

 {California Sta. Circ. 173 {1917), pp. 15, figs. 12).— This circular briefly ex- 

 plains the details of wood-hoop silo construction with special reference to 

 conditions, requirements, and available materials and facilities of California. 



Poultry houses and appliances {London and New York: Cassell d Co., Ltd., 

 1917, pp. 156, figs. 226). — This is a popular handbook of information on the 

 subject, containing the following chapters: The building of poultry houses; 

 troughs and fountains ; nesting boxes and trap nests ; coops ; some special pens ; 

 scratching sheds, etc. ; hurdles, fences, etc. ; various poultry houses described in 

 detail ; ornamental poultry houses ; intensive-system poultry houses described 

 in detail ; heated chicken-rearers ; cold chicken-rearers ; and grain distributor 

 for poultry. 



Chicken houses, R. M. Sherwood {Kansas Sta. Circ. 61 {1917), pp. 15, figs. 

 16). — This circular points out the general requirements of chicken-house con- 

 struction for Kansas conditions, and includes illustrations of a number of 

 chicken houses and floor plans for the same, showing various plans of building, 

 arrangements of fixtures, and systems of ventilating. 



Ice houses, H. E. Murdoch {Montana Sta. Circ. 59 {1916), pp. 8, figs. 4). — 

 This circular deals with the design and construction of farm ice houses, with 

 special reference to Montana conditions. 



RURAL ECONOMICS. 



Agricultural cooperation and organization, G. Radford {London and New 

 York: Hodder & Stoughton, 1917, 2. cd., pp. jf5-}).— The author has define<l the 

 ultimate object of the cooperative movement as it affects the land in the pro- 

 duction of more, better, and more uniform qualities in, stocks and crops, and 

 the distribution of these when produced, both more efficiently and at a lower 

 cost. He has applied these principles to the production of such articles as milk 

 and milk products, meat, bacon, and poultry, and to finance, insurance, and 

 transportation. 



Cooperative buying by farmers' clubs in Minnesota, E. D. Durand and 

 H. B. Price {Minnesota Sta. Bui. 167 {1917), pp. 3-44, figs. 2).— The authors 

 have described a number of typical buying organizations of farmers as found 

 in Minnesota, and have summarized their investigations as follows : 



" In Minnesota, cooperative buying by farmers' clubs and other similar asso- 

 ciations and groups is comparatively unimportant from the standpoint of mag- 

 nitude of business. Cooperative buying is more common in the less densely 

 settled sections of the eastern, central, and northern parts of the State than 

 elsewhere. The commodities chiefly bought are those which are bulky and 

 are well standardized, the most important being feed, flour, and twine. 



" In cooperative buying the direct money cost to the consumer usually repre- 

 sents some saving as compared with the prices that would otherwise have to 



