786 EXPERIMENT .STATIOX KECORD. 



.south of the white sands, liniitetl oii the uoilh, west, aud south hy the depth to 

 water and on the east by the alkali and gypsum in the soil. 



It is .stated that most of the pumpinj? plants thus far installed in the basiu 

 are oi)erated by windmills, gasoline cnjjines, or electric motors, but that liorse- 

 powers and steam enjrlnes are also in u.se. 



"Because of the limit.itions in rejiard to both qnanliiy and quality of the 

 underground supply and because of the cost of jtumjiing, it is doubtful whether 

 heavy irrigation, such as is commonly practiced in the Kio Grande Valley and 

 other irrigation districts, will be feasible, except very locally, in Tularosa 

 Basin ; but the sparing use of well water to supijlement rainfall and flood 

 waters contains more promise and .should be given a thorough trial." It is 

 stated that a small amount of well water properly applied as supplemental 

 irrigation with careful melhotls of farming will add greatly to the yield of 

 certiiin crops, i)artifularly for;ige and other field crop.s, vegetables, and fruit. 



The use of surface water free from bacteria as drinking water, Haupt 

 il'harm. Zvntralhalle, 55 {VJUi), No. JfO, pp. 861-806).— Tha author describes 

 briefly experiments which, in his oi:»inion, demonstrate the feasibility of using 

 definite quantities of calciiun hyjiochlorite in the sterilization of surface water 

 for drinking purposes in emergency cases and at the same time using alum for 

 the precipitation of suspended matter and colloidal matter in solution. The 

 taste may be more or loss removed by filtration through iron filings. 



The chemical disinfection of water, E. B. Phiclps (Piih. Hcaltli lipts. \U. ,s'.], 

 h'cprint 225 {191Jf), pp. 8. figs. 3). — This paper describes methods and simple 

 apparatus for applying the hypochlorite process in the purification of small 

 community and private water suiiiilies. 



Bleaching powder or calcium hypochlorite, it is stated, should be bought on 

 specification to contain not less than 33 per cent available chlorin. The Ameri- 

 can product is considered less likely to give troublesome odors to the water 

 than the imported product. The minimum quantity of solution which can be 

 properly controlled and measured is said to be about 15 gal. per hour. For 

 small plants hand mixing is said to be satisfactory. The solution in the mixing 

 tank is allowed to stand four hours or longer and may then be drawn off into 

 the .solution tanks, where it is diluted to the proper strength. A set of (3 or 

 7 vinegar barrels properly connected v^^ith galvanized iron jiiping and well 

 painted on the outside witli asphaltum or some good mineral paint makes a 

 satisfactory temporary plant. Small plants are said to be most easily run on 

 the constant strength basis. 



"On the basis of 33 per cent bleaching powder (which allows for los.ses in 

 extraction) 25 lbs. per million gallons of water will give one part per million 

 of available chlorin. Clear, colorless ground water, free from iron, or the 

 clear water of large lakes requires, as a rule, from 0.1 to 0.3 parts of chlorin 

 or 2,5 to 7.5 lbs. of bleaching powder per million gallons, Mountain streams 

 and upland water free from color aud turbidity and without storage in ponds 

 require from 0.2 to 0.5 parts. Colored river waters, swamp waters, and highly 

 polluted surface waters may require as much as one part or more," 



Profile surveys in Willamette Biver Basin, Oregon {U. S. Qeol. Survey, 

 Water-Supplij Paper 3-YJ {lOUi). pp. 8, ;j/-v. 16). — This report, prepared under 

 the direction of R. B. Marshall, describes the general features of the Willa- 

 mette River Basin and gives plans .-md profiles of streams therein. 



Profile surveys in Wenatchee River Basin, Washington ( V. S. GeoJ. Sur- 

 rey. Watcr-Suppli) Paper ,}68 {lOL'f)- PP- 7. pU. 8). — This report, prepared under 

 the direction of R. B. Marshall, describes the general features of the Wenat- 

 chee River Basin and gives a i)lan and profile of Wenatchee Lake, Wenatchee 

 River, and certain tributaries. 



