S. L. Foster


W[illiam] E. Colby


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UNITED. RAILROADS OF SAN FRANCISCOOFFICE OF CHIEF ELECTRICIAN1140 FILLMORE STRUTIN REPLY REPER TONOTIFICATION OF WATER[illegible]San Francisco,Sept. 25th, 1912.W. E. Colby,Secretary, Sierra club,302 Mills Building, City.Dear Sir:- It may seem rather "far fetched" and visionary to advance the argument in the Ketch Hetchy matter that the water of the Tuolumne o any on is too pure and is so free ofcalcium salts from having run over only granite, that its useis liable to lead to tuberculosis and dental Caries but I amgoing to give you an apparent justification for the argument andleave it to your Judgment aided by the advice of some of thegood medical, as well as geological members of the club as toits utility at this time.In the "Literary Digest" of July 6, 1912 page 217 under the head of "Will Pure Water Harm the Teeth?" appeared an interesting article abstracting comments in European medical journals on the claims of a Dr. Roese - a German physician who Claims that absence of calcium salts in drinking water or the use of boiled water predisposes and leads to decay of the teeth. "Obviously, for the same reason, the water of lime stone regions are preferable to those where the soil is granitic." x x x "Decalcification of water is one of the conditions most favorable to the development of tuberculosis" , are extracts from this Digest article.In the San Francisco "Examiner" of July 21st, 1912 in the"Magazine" part is a full paged article entitled "Science Discovers06327


San Francisco

Date Original

1912 Sep 25


Original letter dimensions: 28 x 21.5 cm.

Resource Identifier


File Identifier

Reel 20, Image 1331

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Page Number

Page 1


John Muir, correspondence, letters, author, writing, naturalist, California, correspondent, mail, message, post, exchange of letters, missive, notes, epistle