RECORDS OF MEETINGS. 739 



Voted, To meet on adjournment on the second Wednesday 

 in November. 



The following communication was given by Professor Charles 

 R. Cross : — 



" Description of a Mechanical Model devised by Professor 

 Schwamb to illustrate the Theory of Rotary Polarization of 

 Light." 



The following papers were presented by title : — 



" A Quantitative Determination of the Anomalous Dispersion 

 nf Sodium Vapor in the Visible and Ultra- Violet Regions." By 

 R. W. Wood. 



" A Revision of the Atomic Weight of Iodine." By G. P. 

 Baxter. 



" Some Additions to the Arc Spectra of the Alkali Metals." 



By F. A. Saunders. 



" The Effect of Heat on the Color Changes in the Skin of 

 Anolis cavolinensis Cuv." By G. H. Parker and S. A. Starratt. 



" The Achromatization of Approximately Monochromatic In- 

 terference Fringes by a highly Dispersive ]Medium, and the 

 Consequent Increase in the xVllowable Path-Difference." By 

 R. W. Wood. 



Nine humlred and fifty-second Meeting. 



November 9, 1904. — Adjourned Stated Meeting. 



The Academy met at the house of the President in Cambridge. 



The President in the chair. 



The following death was announced by the Chair : — 



Dr. Samuel Leonard Abbot, Resident Fellow in Class II., 

 Section 4, Recording Secretary of the Academy from 1854 

 to 1863. 



The following letter was read by the Recording Secretary : — 



10 June, 1904. 

 My dear Professor Watson, — 



In accordance with a vote passed at the meeting of the Academy held 

 on the 8th instant, I have bought, in the name of the American Academy 



