June 17, 1921] 



SCIENCE 



553 



teeth, were exhibited, together with a photo- 

 graph of the metamorphosis into the elver. 

 The accompanying models illustrated the 

 changes from the yellow eel with its thick 

 lips, small eye, and compact pectoral fin, into 

 the thin-lipped, large-eyed silver eel with 

 pointed pectoral fin, the latter form of eel 

 being that which migrates to the ocean to be- 

 come mature. Dr. John Eennie demonstrated 

 the mite, now named Tarsonemus woodi, 

 which has been claimed by Bruce White to be 

 the causal agent of Isle of Wight disease in 

 bees. White showed that the mites perforate 

 the tracheae, and by their numbers obstruct the 

 spiracles and thus deprive the bees of the 

 power of flight. Mr. J. E. Barnard gave a 

 demonstration of the microscopic appearances 

 of sections by ultra-violet light. Certain 

 structures, owing to their differences in chem- 

 ical composition, give different fluorescent 

 tints, and the images obtained are often dis- 

 similar to those obtained by ordinary staining 

 methods. The light filter used was a glass 

 made by Chance, which is transparent to the 

 ultra-violet radiations, and the quartz sub- 

 stage condenser was of the " dark-ground " 

 type. A most interesting and instructive as- 

 tronomical model designed for educational 

 purposes was exhibited by Dr. William Wilson. 

 This model, which has received great praise 

 from leading astronomers and teachers, not 

 only demonstrates the more familiar motions 

 of the sun, earth, and moon, and the various 

 phenomena resulting therefrom, but is capable 

 of simple analyses of each particular motion. 

 The apparatus is most ingenious. 



SCIENTIFIC NOTES AND NEWS 



Dr. George E. De Schweinitz, professor of 

 ophthalmology at the University of Pennsyl- 

 vania, was elected president of the American 

 Medical Association at the meeting held last 

 week in Boston. Other ofiicers were elected 

 as follows: Frank B. Wynn, of Indianapolis, 

 vice-president; Dr. Alexander R. Craig, of 

 Chicago, and Dr. William Allen Pusey, of 

 Chicago, were reelected secretary and treas- 

 urer, respectively. 



At the recent commencement of New Tork 

 University, the degree of Doctor of Laws was 

 conferred on Dr. George David Stewart, pro- 

 fessor of surgery at the university. 



The honorary degree of Doctor of Science 

 was conferred upon C. L. Marlatt, assistant 

 chief of the Federal Bureau of Entomology, 

 and chairman of the Federal Horticultural 

 Board, by the Kansas State Agricultural Col- 

 lege at its fifty-eighth commencement on June 

 2, " in recognition of his contributions to our 

 knowledge of insects and his efficient services 

 in initiating the policies and directing the 

 work of the Federal Horticultural Board." 



The degree of doctor of engineering will be 

 conferred by the Stevens Institute of Tech- 

 nology on Dr. Sven Wingquist, the Swedish 

 engineer, who comes to the United States by 

 invitation of the institute on the occasion of 

 the celebration of its fiftieth anniversary. 



Dr. Wm. Curtis Farabee, president of the 

 American Anthropological Association, has 

 been elected a corresponding member of the 

 ITational Academy of History, Ecuador. 



The Adams prize of the University of Cam- 

 bridge has been awarded to Dr. W. M. Hicks, 

 St. John's College. 



The friends and former students of Pro- 

 fessor A. Swaen are planning to place a tablet 

 in his honor in the Institute of Anatomy at 

 the University of Liege where he has taught 

 for thirty years. 



Dr. T. W. Fulton, scientific superintendent 

 of the Fishery Board for Scotland, has retired 

 after a service of thirty-four years. 



Mr. Bradley Stoughton has resigned the 

 secretaryship of the American Institute of 

 Mining Engineers, which he has held since 

 1913. Mr. Stoughton's resignation is in ac- 

 cordance with his personal belief that the 

 office of secretary of the institute should not 

 be permanent, since too long a tenure of office 

 is likely to create relations that can not be 

 terminated agreeably. During Mr. Stough- 

 ton's tenure the membership of the institute 

 has increased from 3,500 to over 9,000. 



