REPORT ON THE LOEB COLLECTION OF CHEMICAL TYPES. 

 By F. L. Lewton. 



In the autumn of 1921 the two steel storage cabinets especially built 

 to preserve the chemical type specimens were turned over to the 

 National Museum by the Chemists' Club of New York City. New 

 blank forms for recording the important scientific data concerning 

 each specimen were printed and a number were sent to the mem- 

 bers of the advisory committee, who offered to solicit specimens of 

 chemical-type material for the collection. This committee, as now 

 constituted, consists of Dr. C. L. Alsberg, Food Research Institute, 

 Leland Stanford Junior University, Stanford Universit}^, Calif., 

 chairman; Dr. Victor Lenher, University of Wisconsin, Madison, 

 Wis. ; James K. Senior, Cincinnati, Ohio ; Dr. G . C. Spencer, 

 representing the Bureau of Chemistry, United States Department of 

 Agriculture; and the writer (F. L. Lewton), representing the 

 National Museum and in charge of the collection. 



A portion of the original material of each of seven new chemical 

 compounds discovered and prepared in the division of chemistry, 

 United States Department of Agriculture, were transferred to the 

 National Museum, accessioned in the regular manner, and entered 

 in the catalogue of the Loeb Collection of Chemical Types. Under 

 the direction of Doctor Spencer, of the advisory committee, repre- 

 senting the Bureau of Chemistry, these specimens were placed in 

 specially made glass tubes, which were then exhausted of air and 

 scaled off in order to preserve for as long as possible the specimen in 

 its original condition. 



Dr. Oscar Hedenberg, of the Mellon Institute. Pittsburgh, Pa., 

 was authorized to work up for the Loeb collection the original ma- 

 terial representing the discoveries of the late Dr. John IT. Nef, 

 which is now in Doctor Hedenberg's hands. 



With the assistance of Mr. Senior, of the advisory committee, 

 agreements were made with the editors of the Journal of the 

 American Chemical Society and the Journal of Biological Chem- 

 ist^ that advance notices of the publication of new chemical com- 

 pounds in these journals would be sent to the Museum, in order that 

 prompt solicitation could be made to the discoverer for his con- 

 tribution of the chemical type material to the Loeb collection. 



With facilities now at hand for properly caring for specimens 

 of chemical-type material and with the many promises of specimens 

 from many chemical investigators, it is hoped that a large number 

 of additions may be made to the Loeb collection during (he coming- 

 year. 



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