RURAL ENGINEERING. 187 



was first brought into contact with killed fowl cholera bacteria was lowered or 

 entirely destroyed when injected into animals which received simultaneously 

 intraperitoneal or subcutaneous injections of the bacteria. If the immuniza- 

 tion is made 18 hours before the infection, the weakening effect is not noted. 

 If the animal is infected peritoneally and inmiunized at the same time, but 

 with a dose selected to kill after 18 to 20 instead of 12 hours, the immunizing 

 power of the serum is not affected. 



The rapid cure of polyneuritis gallinarum by intramuscular injection of 

 a substance isolated from rice — note on the pathology of the disease, O. 

 Wellman, a. C. Eustis, and L. C. Scott (Amer. Jour. Trap. Diseases and 

 Prev. Med., 1 {WIS), No. 4, pp. 295-299) .—The investigations of which the 

 preliminary report is here given were carried on along lines similar to those 

 indicated by Funk (E. S. R.,-27, p. 868) and others. 



Healthy chickens were fed on diets of polished rice, grits, and sago, and in 

 the interval before the symptoms of polyneuritis should show themselves, intra- 

 muscular injections were made of extracts of rice polish prepared by the same 

 method as that used by Funk, save that after concentrating " and neutralizing 

 with NaOH, Ba(0H)2 w'as added and the barium soaps together with the preci- 

 pitated phytin filtered off. Barium was eliminated with carbon dioxid and 

 sulphuric acid, following which came the precipitation with phosphotungstic 

 acid, its decomposition with baryta, and concentration of the filtrate in vacuo at 

 from 50 to 56° C." 



The authors feel justified in drawing the following provisional conclusions 

 from the investigations as thus far conducted: "The curative substance acts 

 independently of the liver or alimentary tract, and it is readily absorbed from 

 intramuscular injections. Degeneration of the nerves is confined principally 

 to disturbance in the myelin sheath of the fibers. Neither the sensory nor motor 

 tracts of the cord, medulla, or brain undergo any observable changes. There is 

 a possibility that the cause of convulsions may lie in spinal irritation caused by 

 subdural hematomas due probably to increased permeability of the vessel walls." 



RURAL ENGINEERING. 



Irrig-ation branch (Rev. Rpt. Bihar and Orissa [India], Irrig. Branchy 

 1911-12, pp. //-f 9+24+28+5+2). —The transactions of the irrigation depart- 

 ment of the Government of Bihar and Orissa for the year 1911-12 are given in 

 so far as they relate to works of irrigation and navigation. 



Irrigation of Santa Cruz Valley, M. C. Hinderlider {Engin. Rec, 68 (1913), 

 Nos. 8, pp. 200, 201, figs. 3; 9, pp. 242, 243, figs. 8).— This article describes a 

 system for recovering underground water in Arizona by means of deep wells 

 and pumping stations. Since the water-bearing formation underlying the im- 

 pervious subformation beneath the valley is comparatively shallow it was nec- 

 essary to develop unusual and novel features, the most important of which is a 

 recovery system consisting of 19 wells drilled to depths ranging from 45 to 150 

 ft. in a straight line across the narrow part of the valley to intercept the under- 

 ground waters, together wath the necessary pumping equipment. These wells 

 are connected by means of a gravity conduit of reinforced concrete 4,740 ft. in 

 length, located and built from 5 to 12 ft. below the water plane of the valley. 



The distributing system consists of a reinforced concrete pipe line 48 in. in 

 diameter and 1,500 ft. in length, forming the outlet from the recovery system ; 

 a 48 in. concrete siphon under the Santa Cruz River; about 7 miles of earth 

 canal, some of which is lined with concrete; and 21 miles of laterals. 



Pressure pipes for the conveyance of water and for inverted siphons, 

 B. A. Etcheverry (Jour. Electricity, 30 (1913), Nos. 21, pp. 41 4, 415, figs. 2; 22, 

 28054°— 14 7 



