392 



SCIENCE 



[N. S. Vol. XXXIII. No. 845 



lished in the Journal of Morphology during the 

 year of 1911. 



The Idiochromosomes in Ascaris felis: C. L. 

 Edwards, 661 East 170th St., New York City. 



Effect of Conjugation on the Stock in Para- 

 mecium: H. S. Jennings, Johns Hopkins Uni- 

 versity. 



The Organs of Equilibration in Pelecypod Mol- 

 luscs: Ulkic Dahlgeen, Princeton University. 



The Anatomical Basis of Mulatto Color: H. E. 

 JOEDAN, University of Virginia. 

 This paper will appear in the American Nat- 

 uralist. 



Variation in the Embryos of the Hagfish, Homea 

 (Bdellostoma) stouti: Bashfobd Dean, Co- 

 lumbia University. 



A New Phase of the Question of the Irritability 

 of the Skin of Vertebrates to Chemical Stimuli: 

 Q. E. COGHILL, Denison University. 



The Comparative Toxicity of a Series of Electro- 

 lytic and Non-electrolytic Compounds with Re- 

 spect to Fundulus heteroclitus: E. E. Sheldon, 

 University of Pittsburgh. (Introduced by S. 

 H. Gage.) 



The Senses, Courtship and Mating in Tarantulas: 

 A. Peteunkevitch, lale University. 



A Case of Regeneration in Tarantulas: A. Pe- 

 teunkevitch, Yale University. 



The Origin and Heredity of Four Wing Mutations 

 in Drosophila: T. H. Moeqan, Columbia Uni- 

 versity. 



The Heredity of Red Eyes, White Eyes and Pink 

 Eyes in Drosophila: T. H. Moeoan, Columbia 

 University. 



Tlie University of Michigan Biological Station: 

 A. S. Pease, University of Michigan. 

 In addition to the papers read the following 



exhibits and demonstrations were presented: 



Specimens of the 2100th Generation of Para- 

 mecium aurelia, attained without Conjugation 

 or Artificial Stimulation: L. L. Woodeuff, 

 Yale University. (Presented by title only.) 



On the Senses, Courtship and Mating in Taran- 

 tulas—Regeneration in Tarantulas: A. Pe- 

 teunkevitch, Yale University. 



Inheritance of Color in Oolias philodice: J. H. 

 Geeould, Dartmouth College. 



Regeneration in Hydroids: H. V. Wilson, Univer- 

 sity of North Carolina. 



Raymond Peael, 



THE AMERICAN ASSOCIATION FOR THE 

 ADVANCEMENT OF SCIENCE 



SECTION D— MINNEAPOLIS MEETING 



The section held its meetings on Thursday and 

 Friday of convocation week. The Thursday morn- 

 ing session was devoted to tne routine business 

 connected with election of officers and fellows and 

 to a program of papers, ten in number, of which 

 eight were devoted to road and highway problems. 

 These papers were interesting and valuable con- 

 tributions and should have been heard by a much 

 larger audience than were in attendance. 



Thursday afternoon the section met in joint 

 session with Section B and listened to the address 

 of retiring Vice-president Hayford of Section D 

 on the subject " The Relation of Isostasy to 

 Geodesy, Geology and Geophysics" and to that of 

 Vice-president L. A. Bauer, entitled, " The 

 Broader Aspects of Research in Terrestrial Mag- 

 netism." Both addresses have been published in 

 full in Science and are well worth reading by 

 those who heard them at the meeting as well as 

 by others interested in the subjects. These sec- 

 tions have ever been fortunate in their vice-presi- 

 dential addresses. 



Thursday evening was given over to a dinner 

 and smoker for the members of Sections A, B and 

 D and the Chicago Section of the American Math- 

 ematical Society. The dinner was served by the 

 Commercial Club of Minneapolis. The post- 

 prandial remarks were enjoyed and enjoyable. 



Friday morning Section D held a session de- 

 voted to Aeronautics at which nine papers were 

 read by or for the authors. Quite appropriately 

 the program opened with an appreciation of Dr. 

 Octave Chanute written by James Means, of 

 Boston, and presented by Professor A. Lawrence 

 Rotch, vice-president of the section. This con- 

 tribution will be printed in full in Science. On 

 Friday afternoon, Sections A, D and the Chicago 

 Section of the American Mathematical Society 

 met in joint session for a symposium on engi- 

 neering-mathematics, the same being a discussion 

 of a preliminary report on the subject prepared 

 by a committee appointed at the time of the 

 Chicago meeting of the American Association for 

 the Advancement of Science. Printed copies of 

 the report had been prepared by the chairman of 

 the committee, Professor E. V. Huntington, of 

 Howard University, who opened the discussion, 

 which was continued with spirit during the entire 

 session with profit to all present. 



Professor A. Lawrence Rotch, vice-president of 



