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SAN PEDRO, LOS ANGELES AND SALT LAKE RAILROAD COMPANY OFFICE OF FIRST VICE-PRESIDENT /% B H. BANCROFT, First Vice-president 4 V Salt Lake City, March 19th, 1911. Proposed improvements; Las Vegas water supply Mr. J. Ross Clark, Second Vice-President. Los Angeles, California. Dear Sir:- Replying to your letter March eleventh, and returning here­with batch of papers, including Form 30 to cover proposed improve­ments to Las Vegas water aupply, referred to in Mr.Wells' joint letter of March ninth. As to the effect of vegetable growth in water sources on the quality or condition of the water when used for domestic pur­poses, there appears to be a diversity of opinion; and I am not quite clear why a recent analysis of the water from Las Vegas supply was not attached to this correspondence, February l&th Mr.Cullen writes Mr.Wells that he had ordered sample of this water forwarded to the Medical Department for analysis; Doctor Cochran writes Mr. Wells on March fourth about the matter, but states he has not re­ceived a sample for analysis* The State Chemist of Utah, Mr.Herman Harms, a well-known authority on the subject of water qualities, states that a growth of weeds or other vegetable matter in a stream from which water is used for domestic purposes, is certain to affect its sanitary con­dition. I don't suppose there is any question in anyone's mind but what a little sunshine on the water is a good thing, and for that reason I doubt if it would be advisable to construct a house over the Las Vegas springs, as I understand is contemplated by the