| OCR Text |
Show the observers at these stations 971 and observe the methods they were using in getting the samples that were to be analyzed . During the last four years he spent about ( JOO 1.00 ) days in field work , observing the methods that are used by the observers , ( R . 3794-3797 . ) Observers have been stationed at the different gauging stations mentioned at all times during the years enumerated by him [ Howard ] , and in 1925 the observer commenced taking regular silt samples and water samples from the stream . In taking the samples a mechanical sampler is used , and the water can be sampled ( from frorn ) any depth of the river at any time , and a normal sample of the water at that depth obtained . Water samples were also taken primarily for the purpose of determining the amount of ( dis- dis ) solved mineral in the water . * ( R . ( 3797-3797-A 37973797A ) . ) These ( vater water ) samples also serve as a check on the minimum quantity of solid matter carried in the water of the river . Samples were started to be ( col- col ) lected at the same time at the Bright Angel and Topock Stations . Samples were not taken from the Yuma Station until October , 1927 , inasmuch as the Reclamation S P ( ----j'e je ) had been taking regular silt samples there . Similar samples have been taken at Lees Ferry since October , 1928 . ( R . ( 3797-B 3797B ) . ) The samples at Lees Ferry were taken by Mr . Clark , the gauger , and shipped at no particular intervals [ to Washington , D . C . 1 , where they are analyzed . Water samples are taken daily and silt samples three times a ( week week- week ) , except during the period of rapid fluctuations , especially in the spring . |
