RURAL ENGINEERING. 



889 



able virus which accumulates in the blood, organs, and in the secretions and 

 excretions. Experimental tests showed the incubation period to be a very short 

 one and that death occurred in 2 to 3 days. Geese, ducks, rabbits, and mice 

 could not be infected, while pigeons could be infected occasionally. The author 

 believes the disease to be pestis gallinarum (fowl plague). 



The filaria (Oxyspirura mansoni) of tlie conjunctival sac of fowls, H. 

 FuJiTA {Abs. in Rev. G&n. M4d. VM., 11 (1911), No. 204, PP. 707, 708).— The 

 author reports that the fowls of Formosa nearly always harbor this filaria in 

 abundance in the conjunctival sac. 



On Australian avian entozoa, T. H. Johnston (Jour, and Proc. Roy. Soc. 

 N. S. Wales, U (1910), pt. 1, pp. 84-122) .—The author has here brought to- 

 gether under each host a list of the endoparasites recorded as occurring in birds 

 in Australia, as well as the references to their occurrence. 



RURAL ENGINEERING. 



Irrigation under the Carey Act, A. P. Stovee ( U. S. Dept. Agr., Office Expt. 

 Stas. Rpt. 19 JO, pp. 461-488, pis. 2). — The text of the Carey Act and its subse- 

 quent amendments is given, together with a discussion of the causes which led 

 up to the adoption of the act and the several amendments; an account of the 

 operation of the law in the 8 States and Territories which have accepted its 

 provisions ; lists of irrigation companies operating under the Carey Act, show- 

 ing acreage, estimated cost of systems, and maximum price of water per acre; 

 and other data. A table summarizing the development accomplished under 

 the provisions of the act follows : 



Development accomplished in the West under the provisions of the Carey Act. 



State. 



Number 



of 

 projects. 



Area Area segre- 

 granted by gated and 

 United segregations 

 States. pending 



Additional 

 area tem- 

 porarily 

 withdrawn 

 from entry. 



Area 

 entered by 

 settlers and 



being 

 developed. 



Idaho 



Wyoming. .. 



Oregon 



Montana 



Colorado 



Nevada 



New Mexico. 



Total.. 



Acres. 

 3,000,000 

 2,000,000 

 1,000,000 

 1,000,000 

 11,000,000 

 1,000,000 

 1,000,000 



Acres. 



2,630,833 



1,380,402 



382,528 



411,326 



1,121,940 



60,252 



16,000 



Acres. 



9,063 

 210,596 



112,963 



Acres. 



713,890 



130,004 



54,000 



45,000 



34,000 



167 



10,000,000 



6,003,281 



333,222 



976,894 



1 Exclusive of Ute Indian Reservation. 



Irrigation and agricultural practice in Arizona, R. H. Forbes (Arizona 

 Sta. Bui. 63, pp. 83, pis. S, figs. 8).— This is a reprint of Bulletin 235 of this 

 Office, previously noted (E. S. R., 25, p. 488). It also includes supplementary 

 data showing the area irrigated in 1909 (306,665 acres), the assessed value of 

 property in 1911, and the value of live stock on farms and ranges. 



Development of methods of draining irrigated lands, C. G. Elliott (U. 8. 

 Dept. Agr., Office Expt. Stas. Rpt. 1910, pp. 489-501, pis. 4, figs. 2).— This article 

 discusses causes which produce seepage in irrigated lands and methods of 

 drainage applicable to the arid regions. Methods in use in the Bear River 

 Valley, Utah, western Colorado, and elsewhere are described, together with 

 data on the use of collecting pits and sand traps, special relief wells and dis- 

 charge drains, steam land dredges, cement drain tile and wooden box drains, 

 the pumping of drainage waters from sumps into irrigation ditches, and coop- 

 erative drainage projects. 



