1919] RURAL ENGINEERING. 481 



as the gastric lesions seem less pronounced with the 1 dose. It is quite 

 possible that further experiment will show that a single dose even smaller 

 than 6 drams will be adequate." 



A mycosis of turkeys, R. G. Archibald (Jour. Cotnpar. Path, and Ther., 31 

 (1918), No. J/, pp. 257-260, figs. 4). — This report relates to a disease in a flock 

 of young turkeys in Nyasaland. The affection, in which lumps appeared on the 

 heads and necks and occasionally on the knee joints, had a predilection for 

 young birds, usually attacking those between 6 days and 7 mouths old, with a 

 case mortality of 75 to 85 per cent, while older birds rarely acquired the disease. 

 Macroscopically and histopathologically the lesions showed a striking similarity 

 to epithelioma contagiosum avium. 



ETJRAL ENGINEERING. 



• Operation and maintenance of irrigation systems, S. T. Harding (New York: 

 McGraw-HiU Book Co., Inc., 1917, pp. XII +271, pis. 12, figs. 28).— This is a prac- 

 tical treatise on the operation and maintenance of irrigation systems, based on 

 data derived from such practice in the Western States. The general features 

 of maintenance are first discussed. The maintenance of irrigation structures is 

 next taken up in some detail, together ^\^th the important features in the 

 organization for operation and maintenance. Considerable space is devoted to 

 methods of delivering irrigation water and measurement of irrigation water. 

 Final chapters cover rules and regulations for operation and cost accounting. 



Beclaiming' the arid West, G. W. James {New York: Dodd, Mead cC- Co., 

 1917, pp. XXII+^ll, pis. JfS). — This is a popular treatise on the work of the 

 founders, organizers, and present workers of the U. S. Reclamation Service, 

 and includes descriptions of the main reclamation projects. 



Irrigation opportunities in Russia are great, V. V. Tchikoff {Engin. Neios- 

 Rec., 82 {1919), No. 4, pp. 190-192, fig. i).— The author reviews the irrigation 

 situation in Russia, stating that the chances for both public and private enter- 

 prises are good. Cotton is the principal crop of arid Russia, and agriculture is 

 conducted on the steppes by dry farming methods. Irrigation in Russia is 

 confined mostly to the southern part, which is arid and semiarid. About 

 10,000,000 acres are irrigated in the arid region. Pumping plants are operated 

 here and there, but more than 99 per cent of the irrigation is from gravity 

 canals. In the semiarid regions it is stated that the proper storage of water, 

 an increase in the use of underground water, and the use of economical irriga- 

 tion methods are necessary for future success. 



Measurement of irrigation water {Washington: Dept. Int., U. 8. Reclam. 

 8err., 1918, pp. 5S). — This pamphlet contains tables showing discharge through 

 weirs and orifices and acre-feet equivalents to a given number of second feet 

 of flow. 



Pumping for irrigation, J. B. Marcellus {Kans. Agr. Col. Ext. Bui. 17 

 {1918), pp. 16, figs. 2). — This bulletin gives popular advice on the selection and 

 installation of an irrigation pumping plant, baaed on observations from the 

 various pumping experiments conducted in the Arkansas River Valley. 



Electrically driven high-lift centrifugal pumps supply water for irrigation, 

 B. P. Fleming {Engin. News-Rec, 82 {1919), No. 2, pp. 7^-79, figs. 4).— This 

 article describes the design and construction c i new high-lift irrigation 

 pumping plant with steel manifold and reinforced coiiCvete force main, and 

 reports efficiency tests. The amount of water necessary to be supplied by 

 pumping was estimated at 10,000 acre ft., to be supplied within a period of 

 50 days. A plant of 4 horizontal centrifugal units of 25 sec. ft. capacity each 

 was selected. Each unit was attached by flexible coupling to a 350 hp., 3 phase, 



