REPORT OF NATIONAL MUSEUM, 1922. 103 



culture and other Federal departments. For James H. Harper, of 

 this city, the curator identified and made a mechanical analysis of a 

 specially prepared silk yarn used in the construction of a network 

 for correcting the acoustics of large public buildings. 



Names of special cooperators. — A number of persons deserve special 

 mention for their splendid cooperation in arranging for the con- 

 tribution of specimens to the Museum and for making use of every 

 opportunity of presenting the needs of the Museum to persons and 

 professional bodies in a position to render assistance. In this con- 

 nection it is desired to name Mons. Jean L. Duplan, president of the 

 Duplan Silk Corporation of New York and a member of the French 

 Commission attending the Limitation of Arms Conference; Dr. 

 F. E. Stewart, consulting director of the scientific department of 

 the H. K. Mulford Co., Philadelphia, Pa. ; Dr. J. F. Francis, chief 

 chemist of Parke, Davis & Co., Detroit, Mich.; Dr. W. A. Dewey, 

 of the University of Michigan ; and two representatives of the Ameri- 

 can Osteopathic Association, Dr. Norman C. Glover, of this city, 

 and Dr. George A. Still, of Kirksville, Mo., whose assistance has 

 resulted in completing the exhibit illustrating the principles of 

 osteopathy. 



UESEAUC'HES ELSEWHERE AIDED BY MUSEUM MATERIAL. 



The identification and restoration of missing parts of an ancient 

 spinning wheel, owned by H. E. Eckler, of Cleveland, Ohio, was 

 made possible by the sending to him of a photograph of a similar 

 wheel in the Museum's collection, marked to indicate the missing- 

 parts. 



Specimens of Goto bark were furnished to J. F. Clevenger for use 

 of the pharmacognosy laboratory, Bureau of Chemistry, Department 

 of Agriculture, in the study of a series of barks of this kind collected 

 by the Mulford Biological Exploration of the Amazon Basin. 



The United States Army Medical School was furnished specimens 

 of Cannabis indica and Cannabis americana for use in the trial of 

 a soldier by court-martial. 



Two specimens of Curasao aloes from the drug collections were 

 lent Prof. E. N. Gathercoal, College of Pharmacy of the University 

 of Illinois, for use in the monograph of this medicinal substance by 

 the committee engaged in the revision of the United States Pharma- 

 copoeia. 



DISTRIBUTION AND EXCHANGE OF SPECIMENS. 



Dr. E. L. Griggs, professor of botany at George Washington Uni- 

 versity, was furnished five specimens of fibers of tropical plants for 

 use in teaching. Ten board samples of native woods were pre- 

 pared and sent as a gift to the State Museum, Springfield, 111., and 

 19 hand samples of woods from native and introduced trees were 



