184 



SCIENCE 



[N. a Vol. XLIII. No. 1101 



1. An apparatus that will furnish a flow of 

 about one liter of oxygen-free water per minute. 



2. A determination of the seasonal resistance of 

 fresh-water fishes to low oxygen. 



3. The resistance curve of starving fishes which 

 live without food for three to four months. This 

 curve shows a rise in the resistance of the fishes, 

 i. e., a decrease in their susceptibility, during the 

 first part of the starving period; this increase in 

 resistance lasts for from three weeks to two 

 months and then the resistance usually falls off 

 very rapidly and the fish soon dies of starvation. 



4. The rate of actual loss of weight in starving 

 fishes has been determined by consecutive weigh- 

 ings, and a comparison of loss of weight and its 

 effects upon resistance in young and old fishes has 

 been made. 



5. It has been determined that the reaction of 

 the water, i. e., whether alkaline or acid, has a 

 marked effect upon the resistance of the fishes and 

 the alkaline water seems to be considerably more 

 toxic than the acid in such small concentrations as 

 i\r/3,000 or thereabouts. 



6. When the water is alkaline fishes live longer 

 if corked up in the low oxygen water than they do 

 if the water flows constantly through the experi- 

 mental bottle. 



It is expected that some further data wiU be 

 ready for discussion by the time of the Christmas 

 meeting, as the experiments are being run daily. 

 Chromosomes in Relation to Taxonomy in the Tet- 

 tigidw: W. E. B. Eobektson, University of 

 Kansas. (Introduced by B. M. AiLEN.) 

 Experimental Modification of the Development of 

 the Germ Cells of Eana: B. M. Allen, Univer- 

 sity of Kansas. 

 Compound Chromosomes in Charthippus curtipen- 

 nis: W. E. B. Eobertson, University of Kansas. 

 (Introduced by B. M. Allen.) 



Exhibits 



The society adjourned, after its session for the 

 transaction of business, on the afternoon of Wed- 

 nesday, December 29, to examine and discuss the 

 following exhibits which had been arranged in the 

 bacteriological laboratory on the second floor of 

 the Veterinary Building: 



Elementary Color Patterns and Their Hybrid 

 Combinations in Grouse Locusts, Eobert K. Na- 

 bours, Kansas State Agricultural College. 



Photographs Illustrating (I) Experimental 

 Alteration in the Direction of Growth of a Sili- 

 cious Sponge {Stylotella heliophila Wils.), (II) 



Pseudopodia in Sponge Plasmodia Formed from 

 Dissociated Cells, (III) Canals and Pores that 

 have Developed in a Sponge Plasmodium, H. V. 

 Wilson, University of North Carolina. 



In the co m mon type of this sponge there is a 

 basal body produced upward into vertical lobes 

 bearing oscula at the summit. If such a sponge be 

 laid on its side, the original oscula gradually close 

 and disappear, while new vertical lobes grow up 

 toward the surface of the water, at right angles to 

 the original lobes. The new lobes bear oscula at 

 the summit. 



Wood's Metal Casts of the Recurrent Bronchi of 

 the Adult Lung of the Chicle, Wm. A. Locy, North- 

 western University. 



Sections Showing Pairing of Chromosomes in 

 the Diptera, Charles W. Metz, Carnegie Institu- 

 tion of Washington. 



(1) A Portable Diagram Solder, (2) Labora- 

 tory Dissecting Pan, E. L. Mark, Harvard Uni- 

 versity. 



Model of the Pectoral Spine of Ameiurus, H. D. 

 Eeed, Cornell University. 



Charts and Specimens Demonstrating the Nature 

 of the Intercellular Connective Tissue Substance, 

 Eaphael Isaacs, University of Cincinnati. (Intro- 

 duced by H. McE. Knower.) 



Slides for Demonstrating Chromosomes of the 

 Common Fowl: M. F. Guyee, University of Wis- 

 consin. 



Symposium 

 At the session held during the forenoon of 

 Thursday, December 30, a symposium on the topic 

 "The Basis of Individuality in Organisms," was 

 held, C. M. Child, 0. C. Glaser and H. V. Neal 

 reading papers, the first speaker approaching the 

 problem from the point of view of the physiolo- 

 gist, the second from that of the physical-chemist, 

 the third from that of the vitalist. Illness in the 

 families of E. G. C'onklin and C. E. MoClung pre- 

 vented their attendance. The paper prepared by 

 E. G. Conklin was in the hands of the secretary, 

 but, for want of time, it was not read. It was 

 evident that those who took part in the symposium 

 had given much time and thought to the subject 

 and in the preparation of their papers^ and a vote 

 of appreciation of their efforts to make the meet- 

 ing a profitable and enjoyable occasion was voted 

 by the society, and then adjourned sine die. 

 Caswell Geave, 

 Secretary- Treasurer 



1 It is hoped that these papers will be published 

 in Science during the year. 



