REPORT OF THE AUTUMN MEETING 
757 
That the Editorial Board recommend to the Academy that each member of the Academy- 
be responsible for one subscription to the Proceedings, to be paid for by the member or by 
a subscriber. 
The following resolution was unanimously adopted: 
That the Home Secretary be requested to transmit the thanks of the Academy to the Pro- 
vost of the University of Pennsylvania, the President of the American Philosophical Society, 
the President of the Academy of Natural Sciences of Philadelphia and the members of the 
local committee for the courtesies extended to the members of the National Academy of 
Sciences at the Autumn Meeting, 1917. 
SCIENTIFIC SESSIONS 
Two public scientific sessions were held on November 20 and 21 at which 
the following papers were presented (an asterisk denotes presentation only by 
title): 
Erwin F. Smith, Bureau of Plant Industry, U. S. Department of Agriculture: The wheat 
problem of the United States. 
Liberty H. Bailey, Cornell University: The modern systematist. 
Bradley M. Davis, University of Pennsylvania: A criticism of the evidence for the muta- 
tion theory of De Vries from the behavior of Oenothera in crosses and in selfed lines. (By 
invitation.) 
Jacques Loeb, Rockefeller Institute: The chemical mechanism of regeneration. 
Henry H. Donaldson, The Wistar Institute: A comparison of growth changes in the 
nervous system of the rat with the corresponding changes in man. 
Charles B. Davenport, Station for Experimental Evolution, Carnegie Institution: 
Hereditary tendency to form nerve tumors. 
Lafayette B. Mendel and Thomas B. Osborne, Yale University: Food hormones or 
vitamines in some animal tissues. 
Edgar F. Smith and Walter K. VanHaagen, University of Pennsylvania: The atomic 
weight of boron. 
Samuel J. Meltzer and John Auer, Rockefeller Institute: The effect of intravenous in- 
jection of magnesium sulphate upon tetanus (with a lantern slide demonstration by J. Auer). 
Simon Flexner, Rockefeller Institute: Chemotherapy of spirochetal infections. (For 
Doctors Jacobs and Brown.) 
Clarence E. McClung, University of Pennsylvania: Possible action of the sex-deter- 
mining mechanism. (By invitation.) 
Thomas H. Morgan, Columbia University: The cause of Mosaics and Gynandromorphs 
in Drosophila. 
Herbert E. Ives, Physical Laboratory, The United Gas Improvement Company: Spec- 
trum analysis by differential persistence of vision. (By invitation.) 
Charles G. Abbot, Smithsonian Astroph;y^sical Observatory: The atmosphere and ter- 
restrial radiation. 
Edward Kasner, Columbia University: Geometric aspects of the theory of heat. 
Oliver E. Glenn, University of Pennsylvania: Invariants which are functions of para- 
meters of the transformation. (By invitation.) 
Edwin H. Hall, Harvard University: The validity of the thermoelectric equation P = 
T dv/dT. 
Edwin H. Hall, Harvard University: A thermoelectric diagram on the P-F-plane. 
William B. Scott, Princeton University: The Astrapotheria of the Patagonian Miocene. 
Henry F. Osborn, American Museum of Natural History: Evolution of the Titanotheres; 
final conclusions. 
