428 



EXPERIMENT STATION RECORD. 



The following table, showing the water supply of the Cache Valley 

 and what becomes of it, has been compiled from more than 9,000 stream 

 and canal measurements and estimates: 



The water supply of Cache Valley exclusive of Bear River. 



June 15 



June 20 



June 25 



June 30 



July 5 



July 10 



July 15 



July 20 



July 25 



July 30 



August 5 . . . . 

 August 10 . .. 

 August 15 . .. 

 August 20 . . . 

 August 25 ... 

 August 30 ... 

 September 5 . 

 September 10 

 September 15 



Second-feet. 



3,275.8 



3, 006. 



2, 537. 5 



2.107.0 



1,805.9 



1,501.4 



1,552.5 



1,341.3 



1,244.2 



1, 224. 3 



1,108.2 



1,036.9 



998.6 



997.7 



938. 4 



905.2 



813.2 



938.9 



864.6 



CTsed for 

 irrigation. 



Second-feet. 



1, 163. 1 



1. 162. 9 



1, 159. 1 



1, 136. 



1,081.9 



1. 020. 2 



925. 5 



800.0 



755 6 



731.9 



632. 2 



573.4 



547.5 



512.3 



470. 5 



442.8 



399.7 



352. 7 



334.7 



Outflow. 



Second-feet 



2,659 



2,029 



1,884 



1,739 



1,149 



849 



684 



074 



554 



554 



557 



562 



462 



417 



438 



553 



508 



588 



603 



Average 

 monthly 

 gain from 

 seepage. 



Second-feet. 



500. 4 



61.5 



Tables and diagrams give the amount of water used for irrigation 

 purposes and the area irrigated. From these it is estimated that " the 

 irrigating duty of water in Cache Valley during the month of June. 

 1890, was 52 acres for each second-foot of water diverted; for July, 07 

 acres; for August, 113 acres, and for September, 106 acres; the average 

 from June 15 to September 15 being 99£ acres per second-foot." 



The value of a bacteriological examination of -water from a 

 sanitary point of view, E. K. Dunham (Jour. Amer. Chem. Soc, 19 

 {1897), No. 8, pp. 591-605). — It is stated that a large proportion of the 

 bacteria in reservoir water are derived from the air and are strictly 

 aerobic. Gelatin cultures made in air and in hydrogen furnish a means 

 of determining the number of such organisms present. Examinations 

 for Bacillus coll communis furnish a means of detecting contamination 

 with human feces. For detecting this organism the putrefaction test 

 based upon Schardiuger's method ' is recommended. It is claimed that 

 a combination of these two tests gives a method of examination which 

 " is better calculated to give a just estimate of the fitness of a water for 

 drinking purposes than the methods in more common use." ' This claim 

 seems to be borne out by the results of a number of trials of the method 

 on water from different sources. 



Alkali in the Rio G-rande and Animas Valleys, A. Goss and H. 

 H. Griffin [New Mexico Sta. Bui. 22, pp. 21-52, Jig. J).— This bulletin 

 discusses the formation, kinds, and composition of alkali, surface accu- 

 mulation of alkali, injurious effects of alkali, and remedies. Analyses 

 are given of 3 samples of alkali from the Rio Grande Valley and one 



1 Centbl. Bakt. n. Par., l(i | 1894 I, p. 833. 



