212 ANNALS NEW YORK ACADEMY OF SCIENCES 



SECTION OF ASTRONOMY, PHYSICS AND CHEMISTRY. 



23 October, 1911. 



Section met at 8:15 p. m., Vice-President Campbell presiding. 



The minutes of the last meeting of the Section were read and approved. 



The following programme was then offered : 



William Campbell, Some Recent Developments in Metallurgy. 



Summary of Paper. 



Professor Campbell, starting with the definitions of metallurgy and 

 metallography, first discussed the structure of metals and the effect of 

 annealing such material as drawn or rolled nickel contrasted with that of 

 very low carbon steel (Stead's Brittleness). The modern classification of 

 alloys, according to solubility in the liquid and solid states, was illustrated 

 with examples such as monel metal, the brasses, the lead-tin solders and 

 the lead-antimony group. Changes in the solid state were shown by the 

 bronzes with Shepherd's diagram; iron and steel with the various dia- 

 grams from the Rooseboom-Roberts Austen lo Upton; the effect of heat- 

 treatment, hardening and tempering. The ternary alloys were illustrated 

 by the white metals, lead tin antimony, tin antimony copper ; by German 

 silver, plastic and phosphor bronzes, etc. Finally the work of Friederich 

 on sulphides and arsenides and of the Geo-Physical Laboratory on sili- 

 cates was summarized. 



The Section then adjourned. Edward J. Thatcher, 



Secretary. 



SECTION OF ANTHROPOLOGY AND PSYCHOLOGY. 



30 October, 1911. 

 Section met at 8:15 p. m., Gen. James Wilson Grant presiding. 



The minutes of the last meeting of the Section were read and approved. 

 The following programme was then offered : 



Marshall H. Saville, Travels in the Lake Region of Northern 



Ecuador. 



The Section then adjourned. 



F. Lyman Wells, 



Secretary. 



