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COPY 565 CENTRAL AVENUE EASr ORANGE, N. J. June 17th, 1921. Dear Mr. Rooder:- MMN Your letter June 15th on hand. Forwarding of chesks in the way practiced during my past connection with R. L. M. will be perfectly satisfactory to me. Sorry I could not attend matter of Bilstéin any sooner since I just arrived this noon from out the town trip. If it is desirable I would talk over the matter of changing the grades of undark with Bilstein and after several samples are made and compared by me, I would suggest what I would do in the case. Be it under- stood, however, that the fact does not need to be considered as intrusion on my part. Comparison of old and new material off hand and roughly speaking would look as follows:- Old Mkrgr New D 100 75 E 66.6 55 F 50 40 G 33.3 27 or 25 H 25 - MM I 16.6 16.6 J 12.5 12.5 using new sinc and maintaining its quality constant dese or (it is hard to do that in present zinc lab.) selecting only suitable zinc - that is rejecting any run not coming up to quality - will make this reduction