338 



SCIENCE 



[isr. S. Vol. XXXIII. No. 844 



of tte Brown Leghorn pepper-and-salt pat- 

 tern. The Fj brown females are yellower on 

 the fore part of the hack and wings than are 

 the Brown Leghorns. They seem to resemble 

 some of Goodale's Fi brown females, but none 

 are as dark as some of his. Perhaps such 

 would have appeared if a larger number had 

 been raised. 



These results show that the gray pattern 

 behaves as the barred and brown ones have 

 already been shown to do. The results may be 

 explained as the others are. Represent the 

 gray factor by G, the brown by B, and female- 

 ness by F. Assume that both G and B are 

 spurious allelomorphs to F.^ 



The representation will be 



Brown Leghorn c? — gBf gBf -i 



Columbian Wyandotte ? — GfgFj 



(-gBf Gf — gray c?. 



P'-°'i^<=^{gBfgF- brown?. 



Columbian Wyandotte t? — Gf Gf i 



Brown Leghorn 5 — gBf gbF f 



fGr gBf — gray <^. 



produced " ?, 



\6fgbr — gray ?. 



Nothing has yet appeared to show the com- 

 position of the Columbian Wyandotte with re- 

 gard to B. 



Several years ago a Columbian Wyandotte 

 male was mated to a female of the Silver 

 Laced Wyandotte breed, which has black 

 wherever the Columbian has it and also has 

 the feathers of the back, breast and shoulders 

 white, edged or laced with black. The Fi birds 

 were nearly typical Columbians, one of the 

 males being near enough to that color to win 

 a prize as a Columbian at a poultry show. 

 Some of the females, however, showed black 

 edging on the tips of some of the feathers of 

 the back. One of these was mated to a Co- 

 lumbian Wyandotte male, and the result was 

 practically the same as in the F^ generation. 

 Unfortunately, this cross was not made in the 

 right direction to bring out the sex-limited 

 character, but the result agrees well with that 

 described above. 



A. H. Sturtevant 



CoLtrMBiA University, 

 January 2, 1911 



^ Goodale's work ( mentioned above ) has shown 

 that B is sex-limited. 



TBE AMERICAN ASSOCIATION FOB THE 



ADVANCEMENT OF SCIENCE 

 THE FORTY-THIRD GENERAL MEETING OF 



THE AMERICAN CHEMICAL SOCIETY 

 AND SECTION C 

 The forty-third general meeting of the Amer- 

 ican Chemical Society and Section of the 

 American Association for the Advancement of 

 Science was held at Minneapolis in the Chemistry 

 Building at the University of Minnesota, Decem- 

 ber 28-31, 1910. The first general meeting was 

 called on Wednesday morning. 



About 300 members and guests registered for 

 the meeting. Approximately 275 of these were 

 members of the society. The meeting was a thor- 

 oughly good one from the consideration of attend- 

 ance, number and quality of papers, and the 

 generally good time which every one enjoyed 

 because of the generous hospitality of our hosts. 



The council of the society met on Wednesday 

 afternoon and Thursday evening, when the gen- 

 eral business and election of officers were consid- 

 ered. 



Wednesday evening the Minneapolis Section of 

 the society extended a complimentary smoker to 

 the visitors at the Commercial Club. Compli- 

 mentary luncheons were also prepared for the 

 visitors during each day of the session. 



On Thursday and Friday afternoons excursions 

 were made to the Minneapolis flour mills. Inter- 

 national Stock Food Factory, St. Anthony Falls 

 Power Company, the linseed oil and paint com- 

 panies. On Saturday afternoon the visitors en- 

 joyed a free excursion to the many points of 

 interest about Minneapolis and St. Paul. 



The following papers and addresses were given 

 before the general meetings: 



"A Universal Law," President W. D. Bancroft. 



" Report for the International Committee on 

 Atomic Weights," F. W. Clarke. 



" The Lost Arts of Chemistry," W. D. Richard- 

 son. 



" The Basis of Industrial Efficiency," Arthur D. 

 Little. 



" Synthetic Metals from Non-metallic Ele- 

 ments," Herbert N. McCoy. 



" Progress in Food Chemistry," H. E. Barnard. 



" Mechanism of Cell Activity," Carl L. Alsberg. 



" Waste Wood and some of its By-products," 

 Geo. B. Frankforter. 



" The Formation of Carbohydrates in the Vege- 

 table Kingdom," Wm. McPherson. 



