In response to our inquiry adhessed to the Aluminum Co., the follm'ng information was received: We have in our possession a pattern, from which a t various times, castings similar to the one you mentioned, have been made. We also know that a number of these castings were presented to members of the American Chemical Society who visited our plant a t New Kensington in 1892. It stands to reason, then, that if Dr. Remsen was among the party which visited the plant, in that year, he was probably given one a t that time. We have no record of the names of the men who made that visit, and we also know that similar castings have been made abroad. It is therefore impossible to positively identify this plaque as one that was cast here, although circumstantial evidence makes me believe that it was. OF AMERICA ALUMINUM COMPANY W. C. WHITE Pmms~uncn,PA.
COMMERCIAL MATERIAL FOR SCIENCE CLASSES* It would seem from an occasional letter which we receive that our name appears in your JOURNAL among a list of firms who are willing to sendmaterial of interest and value to instructors of chemistry in the various schools throughout the country. This has been interpreted in many cases to mean that we have samples of materials showing steps in manufacture, etc. As a matter of fact, the only material which we have is printed matter such as our catalog on Reagents and "C. P.'s," which we publish from time t o time. Will you therefore kindly edit the note in your esteemed JOURNAL in accordance with this information. MERCK& CO., INC. C. S. ROBERTSON RAHWAY. N. J. *See abstracts from Science Classroom (Sept., 1928). THISJOURNAL. 5, 1350 (Oct. 1928); 6, 158 (Jan., 1929).
Mixed Fertilizers in Germany. I t is expected that the production of mixed fertilizers in the new fadory of the Kali-Industrie A. G., of Kassel, and the Klacknerwerke, of Rauxel, will soon start production. It is planned to produce a high percentage of nitrogen and potash fertilizers from ammonia and crude potash, to replace to a considerahlc extent the sales of simple potash products and obviously to compete with the Nitrophoska of the I. G. Farbenindustrie. The Kali Industrie's second new factory in Sondershausen, for the same-kind of fertilizer, the cqnstruction of which was started about nine months ago, is also-nearingcompletion.-Chem. Age, 20, 19 (Jan. 5, 1929).
