( Continued, from, page .'< of over, j 



VOLUME 58. 



1. Ames, A., Jr.. Proctor. C. A., and Ames. Blanche. — Vision and the Technique of Arl. 



pp. 1-47. 2S pis. February, 1923. $1.50. 



2. Birkhoff, George D. and Langer, Rudolph E. — The Boundary Problems and Develop- 



ments Associated with a System of Ordinary Linear Differential Equations of the First 

 Order, pp. 49-128. April, 1923. §3.15. 



3. Vainio, Edward A. — Lichenes in Insula Trinidad a Professore R. Thaxter Collecti. 



pp. 129-147. January, 1923. $1.00. 



4. Rridgman, P. W. — The Effect of Pressure on the Electrical Resistance of Cobalt. Alumi- 



num, Nickel, Uranium, and Caesium, pp. 149-161. January, 1923. 1,75. 



5. Bridgman, P. W. — The Compressibility of Thirty Metals as a Function of Pressure and 



Temperature, pp. 103-242. January, 1923. $1.70. 



6. Baxter, Gregory P., Weatherill, Philip F. and Scripture, Edward W., Jr. — A 



Revision of the Atomic Weight of Silicon. The Analysis of Silicon Tetrachloride and 

 Tetrabromide. pp. 243-268. February, 1923. $.75. 



7. Evans, Alexander W. — The Chilean Species of Metzgeria. pp. 269-324. March, 



1923. $1.25. 



8. Brues, Charles T. — Some New Fossil Parasitic Hymenoptera from Baltic Amber, 



pp. 325-340. March. 1923. $.05. 



9. Kennellv, A. E. ■ — Text of the Charter of the Academic Royale de Belgique. Trans- 



lated from the Original in the Archives of the Academic at Brussels, pp. 347-351. 

 April, 1923. $.40. 



10. Hitchcock, Frank L. — On Double Polyadics, with Application to the Linear Matrix 



Equation, pp. 353-395. May, 1923. $1.15. 



11. Hitchcock, Frank L. — Identities Satisfied by Algebraic Point Functions in N-Space. 



pp. 397-421. May, 1023. $.S5. 



12. Swan, Clifford M. — The Minimum Audible Intensity of Sound. pp. 423—441. 



May, 1923. $.75. 



13. Dunn, Emmett Reid. — The Salamanders of the Family Hynobiidae. pp. 4 43-523. 



June, 1923. $1.75. 



14. Kellogg, O. D. — An Example in Potential Energy, pp. 525—533. June, 1923. $.45. 



15. Lewis, Frederic T. — The Typical Shape of Polyhedral Cells in Vegetable Paren- 



chyma and the Restoration of that Shape following Cell Division, pp. 535-551. 



3 pis. June, 1923. $.S0. 

 10. Wick, Frances G. — The Effect of Pressure upon Optical Absorption, pp. 555—573. 



August. 1923. $.60. 

 17. Records of Meetings; Biographical Notices; Officers and Commit tees; List of Fellows 



and Foreign Honorary Members; Statutes and Standing Votes, etc. pp. 575-664. 



August. 1923. $.75. 



