158 



SCIENCE 



[N. S. Vol. XXXIII. No. 839 



structing and installing groups and models of 

 invertebrates in a museum. Colored slides were 

 shown both of the living invertebrates and of 

 their habitats, and also of the models and groups 

 in course of construction and as completed at the 

 American Museum. The speaker concluded by 

 exhibiting two sketch-models prepared under his 

 direction by Messrs. Matausch and Shimotori, of 

 the museum staff, as preliminary studies for the 

 annulate and pile fauna groups which are in 

 course of construction in the American Museum. 

 Exhibition of Models of Membracidce: Iqnaz 



Matausch. 



The speaker exhibited a series of six enlarged 

 models in wax which he had prepared for the 

 American Museum of Natural History, as well as 

 a series of twenty-three colored drawings and a 

 collection of typical specimens which had been 

 sent him by Professor F. Silvestri, of Portici, 

 Italy. 



The Membracidae, or tree-hoppers, are among 

 the most interesting of insects. Very little is 

 yet known concerning their life histories, a sub- 

 ject to which the speaker said he had devoted 

 considerable attention. They are remarkable for 

 their extraordinary variation in the form of the 

 prothorax. In order to make an enlarged model 

 it is necessary to dismember the insect and to 

 prepare drawings of the different parts to a 

 selected scale. The separate parts are then copied 

 in clay; plaster molds are then prepared and 

 casts made in wax. These are then finished, the 

 details put in, and the whole put together and 

 colored. 



L. HiTSSAKOF, 



Secretary 

 Amebioan Museum of Natueal Histobt 



the ameeican chemical society 

 new tobk section 



The fourth regular meeting of the session of 

 1910-11 was held at the Chemists' Club on Jan- 

 uary 6. 



The Nichols medal, awarded annually for the 

 best paper read before the section, was presented 

 to M. A. Rosanoff and C. W. Easley for their 

 paper " On the Partial Vapor Pressures of Binary 

 Mixtures." Professor W. D. Bancroft, president 

 of the society, made the presentation and Pro- 

 fessor Rosanoff accepted the medal on behalf of 

 himself and Professor Easley. 



In receiving the medal, Professor Rosanoff said: 



" Mr. Chairman, Dr. Bancroft, Dr. Nichols, 

 Qentlemen: I thank you all, on behalf of Dr. 



Easley and myself, for the great honor you are 

 this evening bestowing upon us. It will be an 

 ever-present support against discouragement in 

 the research struggle to which, I hope and believe, 

 my life will be devoted to the end. 



" Much of the honor adjudged to us is due — ^it 

 is a pleasure to admit — to Clark University, 

 whose imexampled freedom, and liberalism, and 

 Nietzschean belief in the future, form an ideal 

 atmosphere for scientific research. 



" Gentlemen, Ostwald prophesies that the cen- 

 ter of gravity of science is bound to move from 

 Europe across the Atlantic. This chemical so- 

 ciety, a body devoted mainly to the furthering and 

 encouragement of chemical research, can do more 

 than any other group of men, more even than the 

 universities, toward hastening that migration, 

 which will open a remarkable era in American 

 history. Every honor conferred by the society on 

 the basis of research must stimulate that migra- 

 tion and will, therefore, rebound to the society 

 itself." 



Mr. T. J. Parker gave an account of the Min- 

 neapolis meeting of the American Chemical 

 Society. 



Dr. W. C. Moore read a paper by Professor H. 

 N. McCoy and himself on " Organic Amalgams." 



Professor Robert Kennedy Duncan addressed 

 the section " On the Relation between Chemistry 

 and Industry in America." Formal discussion of 

 the subject followed by M. 0. Whitaker, L. H. 

 Baekeland and Allen Rogers. 



C. M. Joyce, 

 Secretary 



THE BIOLOQICAL SOCIETY OF WASHINGTON 



The 476th regular and Slst annual meeting was 

 held at the hall of the Cosmos Club, December 10, 

 1910, with President T. S. Palmer in the chair. 



Reports of the secretary and treasurer were 

 read and approved. Four new members were 

 elected. 



The following officers for 1911 were elected: 



President — David White. 



Vice-presidents — W. P. Hay, E. W. Nelson, J. 

 N. Rose and Edw. L. Greene. 



Recording Secretary — D. E. Lantz. 



Corresponding Secretary — N. HoUister. 



Treasurer — J. W. Gidley. 



Members of the Council — A. D. Hopkins, A. K. 

 Fisher, Vernon Bailey, A. B. Baker and Paul 

 Bartsch. 



D. E. Lantz, 



