The purpose of the work here reported was to find, if possible, a water disinfectant suitable for small scale preparation of potable water that would be an improvement on the disinfectant used in the present official Army method for the preparation of potable water in the field. The work to date is reported because of the appointment of a joint board representing both the Chemical Warfare Service and the Medical Department to continue. that search. HISTORICAL A full account of the development of the various methods used to render water potable in quantities both large and small would be beyond the scope of this article. For such an account the reader is referred to the excellent work of Mason (1); a shorter account, dealing more in detail with the chlorine-containing compounds used in such work, is to be found in the book by Race (2). An excellent recent work discussing water disinfection is that by Buswell (3).Suffice it to say that the discovery of the bacterial origin of many of our common diseases and the part played in the spread of these diseases by water and food resulted in the development of large scale methods for the destruction of harmful bacteria in order that large water supplies might be delivered to the users in potable form. At the same time the purification of small supplies and of small quantities of water became urgent. The armies of the civilized nations realized the need of such methods for the purification of water supplies in large and small camps and also out in the field, away from permanent and semi-permanent camps.The methods of use in the small scale purification of water are fully described and discussed in texts on hygiene, sanitation and related
NOTES 3463 semicarbazone prepared from our cyclo-octanone out of cyclohexanone and diazomethane as well as that obtained from Professor Ruzicka.The reaction of the main portion of this fraction with piperidine did not yield homogeneous derivatives of the piperidino alcohol.
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