Document 412dj8Mv5D7Yrz4gbGB2Z94j

Deoember 8, 1952 Mr. C. D. Porch Kinetic Chemicals, Inc. DuPont Bu'Iding Wilmington, Delaware Dear hr. Porch: Thanks for jour letter of December 2nd. In accordance with your wish we shall not approach the matter of Dimethyl Ether. I think it is likely, however, that hr. Robinson has misunderstood my point of view in the matter. It Is not that I am particularly interested In Dimethyl Ether or that I had in mind the desirability of obtaining specific information In relation to Dimethyl Fther. It Is rather that our observations on the anaesthetics Iiave reached the point where it 13 necessary to set up con centration mixtures which can be very accurately controlled and checked at their entrance to the cage 'and at their exit. The ease of handling this problem by the ad-mixture of two gases of approximately the^ same boiling point and vapor pressure such as Dimethyl Ether and P-12, is so much greater than that associated with7 the handling of P-12 and Ethyl Ether that it seemed to Hie worth while to use Dimethyl Ether in this connection. This Is the more time since it is quite clear that there is no possibility whatever of using Ethylene in mixtures with P-12. Nevertheless, in accordance with your desire we shall attempt the more accurate measurements of concentrations in the case of Ethyl Ether.' I make the above explanation not at all for the purpose of persuasion, but rather to indicate the practical point of view involved In my suggestion. Very trul... yonr3, HAKiIS