VOLUME 57. 



t. Kent, Norton A. and Taylor, Lumen B. — The Grid Structure in Echelon Spectrum 

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2. Lotka, Alfred J. — The General Conditions of Validity of the Principle of Le Chatelier. 



pp. 19-37- January. 1922. $.75. 



3. Bridgman, P. W. — The Effect of Tension on the Electrical Besistance of Certain Ab- 



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4. Bell, Louis. — Notes on the Early Evolution of the Reflector, pp. 67-74. February, 



1922. $.50. 



5. Bridgman, P. W. — The Effect of Pressure on the Thermal Conductivity of Metals, pp. 



75-127. April, 1922. $1.25. 



6. Bridgman, P.W. — The Failure of Ohm's Law in Gold and Silver at High Current Densities. 



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7. Pierce, George W. — A Table and Method of Computation of Electric Wave Propagation, 



Transmission Line Phenomena, Optical Refraction, and Inverse Hyperbolic Functions of 

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8. Pierce, George W. — Artificial Electric Lines with Mutual Inductance between Adjacent 



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9. Barker, Franklin D. — The Parasitic Worms of the Animals of Bermuda. I. Trema- 



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10. Bennitt, Rudolf. — Additions to the Hydroid Fauna of the Bermudas, pp. 239-259. 



May, 1922. $.65. 



11. Brues, Charles T. — Some Hymenopterous Parasites of Lignicolous Itonididae. pp, 261- 



288. 2 pis. May, 1922. $.85. 



12. Thaxter, Roland. — A Revision of the Endogoneae. pp. 289-350. 4 pis. June, 19 2. 



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13. Clark, H. L. — The Echinoderms of the Challenger Bank, Bermuda. pp. 351-362. 



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14. Schaeffer, E. B. — Atmospheric Attenuation of Ultra- Violet Light, pp. 363-374. 



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15. Romberg, Arnold.— The Batio of the Calorie at 73° to that at 20°. pp 375-387. 



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16. Bowen, Bobert H. — Studies on Insect Spermatogenesis. IV. The Phenomenon of 



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 November, 1922. $1.65. 



17. Thaxter, Boland. — Note on Two Bemarkable Ascomycetes. pp. 423-436. 2 pis. 



September. 1922. $1.35. 

 '<*. Records of Meetings; B'osraDhical Notices; Officers and Committees; List of 

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 pp. 437-567. November, 1922. $.75. 



(Continued on pnt/e 9 of cover.) 



