THE IREIGATION AGE. 



379 



The elevation at the surface of the ground 

 where these pumps are installed is 297 feet above 

 sea level. When not being pumped, the water in 

 the wells raises and runs over the top of the casing. 

 When being pumped to the full capacity of the 

 pumps, the water is lowered only about 58 feet. 



The water from these pumps is discharged into 

 two 10-inch pipes which connect to Y branches on 

 the 14-inch discharge line leading to the concrete 

 reservoir 672 feet distant. 



The reservoir is 40x100 feet y.S l /2 feet deep, di- 

 vided into two basins 40x50 feet so that one side can 

 be emptied and cleaned, without interrupting the 

 water supply. 



The water first enters a sand box or settling 

 basin before flowing into the reservoir, which pre- 

 vents sand and silt from entering the 20-inch suc- 

 tion pipe leading to the 9x18 F.-M. power pumps in 

 the main building. The elevation on the floor of 

 this building is 310^ feet. Water is thus supplied 

 to the pumps under slight pressure. 



The equipment in the main building consists of 

 3-9x18 Fairbanks-Morse Pot Valve Power Pumps, 

 direct connected to 3-250 horsepower Fairbanks- 

 Morse Four Cylinder Vertical Engines, Type R. E. 

 heavy duty. 



The gas for use in these engines is supplied 

 from the Taft to Bakersfield pipe line of the Califor- 

 nia Natural Gas Company. 



The pumps are fitted with 10-inch discharge 

 pipes which connect to the Y branch fittings on the 

 12-inch main line to Station No. 2 in Taft. 



Each pump is fitted with a relief valve set at 



No. 7 Layne & Bowler Vertical Turbine Pump, Driven by a 50 H. P. 

 Fairbanks Horizontal Oil Engine. 



550 pounds. The line pressure when plant is in 

 operation being from 500 to 525 pounds per square 

 inch, 300 pounds of which is static and 200 to 225 

 pounds caused by friction in the pipe. There are 

 also 4 alleviators on the main line at this point to 

 take care of any water hammer that may occur. 



All Y branches, gates and other fittings were 

 placed in pipe line and tested to 1,000 pounds per 

 square inch hydraulic, pressure. 



SHEEP USED TO TRAP SPOTTED FEVER 

 TICKS. 



The free grazing of 2,500 head of sheep upon 

 the Bitterroot national forest, in the state of Mon- 

 tana, has been authorized by the Secretary of Agri- 

 culture as part of a novel experiment in trapping 

 the deadly spotted fever tick. The forest service 

 and the public health service are working together 



Three 100 H. P. Titusville Tubular Boilers and Two 18x11^x18 Fair- 

 banks-Morse Duplex Valve Pot Pumps. 



in co-operation with local sheep growers in this 

 new campaign. 



It is the general belief of the leading medical 

 authorities that the mysterious and frequently fatal 

 disease commonly known as spotted fever is spread 

 by the tick Dermacentor Andersoni which, in parts 

 of the Bitterroot forest, occurs in such abundance 

 that it constitutes a real menace to man and beast. 

 Surgeon McClintic, of the public health service, died 

 last year of spotted fever contracted during his 

 study of the disease and its control. 



The plan proposed contemplates the grazing 

 of two bands of sheep upon the parts of the forest 

 where the tick is most abundant, with the idea that 

 large numbers of the ticks will attach themselves 

 to the sheep. Then, as occasion requires, the sheep 

 will be freed of the ticks by being dipped in an 

 insecticide solution which will kill the ticks without 

 in any way injuring the sheep. 



The engorging of the female tick with blood 

 is one of the essential functions of reproduction, 

 and this gorging must of necessity take place upon 

 the larger mammals which serve as hosts to the 

 tick. The United States Biological Survey has 

 reached the conclusion that the great bulk of the 

 fever ticks which become filled with blood get their 

 supply while attached to domestic stock, and that if 

 the domestic animals are freed of ticks by dipping, 

 by spraying, or by some other effective method of 

 treatment, the chances of the infection of human 

 beings will be vastly reduced. Of the different do- 

 mestic animals the sheep is the most readily handled 

 and the easiest to dip or treat, hence the selection 

 of sheep for use in the experiment. 



