188 EXPERIMENT STATION RECORD. [Vol.43 



offered for sale in Florida during 1919 and collected for inspection before the 

 enforcement of the State inspection laws, and official analyses of 8 samples of 

 kerosene collected for inspection under the law, are reported. 



Machines for the planting and harvesting of potatoes, G. Fischer {Arb. 

 Oesell. Ford. Baues u. Verwend. Kartoffeln, No. 9 (1917), 2. ed., pp. 35, figs. 17).— 

 This pamphlet describes, illustrates, and discusses the mechanical details of 

 potato planting, digging, and sorting machines used in German agriculture. 



The building estimator's reference book, F. R. Walker (Chicago: Author, 

 1917, 2. ed., rev., pp. YIJ+1-29, lOO-loS, 200-253, 300-30S. 400-.',73, 500-665, 700- 

 895, 1000-1060, 1100-1381, UOO-1542, 1600-1788, 1900-1915, 2000-2025. 2100- 

 2117, 2200-2207, 2300-2320, 2^00-2437, 2500-2519, 2700-2725, 2800-2852. 2900- 

 2906, 3000-3012, 3100-3115, 3200-3207, 3300, 3301, 3/f00-3418, 3501^3.535, figs. 

 4^6). — This is a practical reference book for contractors and estimators engaged 

 in estimating the cost of and in the construction of all classes of modern build- 

 ings. It gives the actual labor costs and methods employed in the erection of 

 some present-day structures, together with necessary prices of material and 

 quantities of labor entering into the estimate of cost of all classes of buildings. 



Concrete-steel construction. — I, Buildings, H. T. Eddy and C A. P. 

 Turner (Minneapolis: [,Anthors'\, 1919, 2. ed., rev., pp. XVI-[-If77-\-XXV, figs. 

 171). — This is a treatise on the elementary principles of design and execution 

 of reinforced-concrete work in buildings and includes the following chapters: 

 Concrete ; general types of concrete .floor construction ; mechanics of stress ; 

 mechanics of permanent deformation and strain beyond the limits of elasticity ; 

 the chemical and mechanical energy of hardening of Portland cement concrete 

 and work performed by it, etc. ; simple beams ; restrained and continuous beams ; 

 indirect stresses generated by bond shear and their laws of distribution ; deflec- 

 tion and mode of operation as shown by contour lines, distril)ution of reactions 

 and moments as shown by lines of zero shear; the continuous imiform slal) on 

 separated supports under uniform loading; reinforced concrete columns; unbal- 

 anced moments in monolithic floors and colunms; experimental verification of 

 tlie theory of flexure of. concrete members ; foundations ; and elements of eco- 

 nomic construction and cost of reinforced-concrete work. 



Concrete cottages, small garages, and farm buildings, edited by A. Lake- 

 siAN (London: Concrete Pubs., Ltd., 1918, pp. XII +170, pis. 30, figs. 11(f) i— 

 This book deals with the design of cottages and small buildings and their con- 

 struction of concrete, and gives numerous examples of such structures. Con- 

 struction methods and labor-saving devices are discussed, and sections are in- 

 cluded on tile and fence-post making and the use of concrete on the farm. 



Concrete floors, feeding floors, and footpaths (Concrete Utilities Bur. 

 [Pamphlet^, No. 6 [1919], pp. 16, figs. 7). — Brief popular information on the 

 construction of concrete feeding floors and sidewalks is given. 



Concrete fences, gateposts, and walls (Concrete Utilities Bur. [Pamphlet], 

 No. 5 [1919], pp. 23, figs. 19). — This pamphlet deals with the construction of 

 concrete fences and walls and with the manufacture of concrete fenceposts. 

 Equipment for use in this work is described and illustrated. 



Concrete tanks and cisterns (Cono'ete Utilities Bur. [PampMet], No. 3 

 [1919], pp. 20, figs. 21). — Data on planning and construction of circular and 

 rectangular tanks and cisterns of plain and reinforced concrete are given. 



Standard poultry houses (New Jersey Stas. Circ. 115 (1920), pp. 3-23, figs. 

 12). — This is a revision of Part 3 of Bulletin 32.5 of the stations, previously 

 noted (E. S. R , 41, p. 885). Three types of houses are described, namely, the 

 New Jersey multiple unit laying house, the New Jersey farm unit laying house, 

 and the New Jersey Vineland contest house. The last house is included on 



