iv CONTENTS. 



Page 



IX. Some Additions to the Arc Spectra of the Alkali Metals. By F. 



A. Saunders 437 



X. The Effect of Heat on the Color Changes in the Skin of Anolis 



carolinensis Cuv. Bv G. H. Parkeu and S. A. Stakratt 455 



XI. A Problem in Statics and its Relation to Certain Algebraic In- 

 variants. Bv M. BocHER 467 



XII. The Mandragora of the Ancients in Folk-lore and Medicine- 



By C. B. Randolph 485 



XIII, A Manometer Device for Air Thermometers. By II. Edwards 539 



XIV. Notes on Resistance Measurements in Platinum Thermomelrij. 



By H. Edwards 547 



XV. The Shoal-Water Deposits of the Bermuda Banks. By H. B. 



BiGELOw 5.57 



XVI. TTie Achromatization of approximately Monochromatic Interfer- 

 ence Fringes by a Highly Dispersive Medium, and the conse- 

 quent Increase in the allowable Path-difference. By R. W. Wood 593 



XVII. A Revision of the Atomic Weight of Strontium. Second Paper. 



— The Analysis of Strontic Chloride. By T. ^Y. Richards GOl 



XVIII. Viscosity of Air. By J. L. Hogg 609 



XIX. A PQ Plane for Thermodynamic Cyclic Analysis. By H. N. 



Davis 627 



XX. New Methods of Determining the Specif c Heat and the Reaction- 

 Heat of Liquids. By T. W. Richards and A. B. Lamb 657 



XXI. New Plants from the Islands of Margarita and Coche, Venezuela. 



By J. R. Johnston 681 



XXII. Oti the Properties of Magnets made of Hardened Cast Iron, By 



B. O. Peirce 69!) 



XXIII. Autocatalytic Decomposition of Silver Oxide. By G. N. Lewis 717 



XXIV. Records of Meetings 735 



Report of the Council 759 



