CONTENTS 



Advertisement . . . .' iii 



List of Officers, Members, and Regents ........ viii 



Aktk'Lk I (S42). On the Application of Interference Methods to Spectroscoi)ic Measure- 

 ments. By .Vlbiort A. MiciiiiLsoN. Publislied 1892. 4to, 24 pp., 5 })lates. 



Article II (980). On the Densities of Oxygen and Hydrogen, and on the Ratio of their 

 Atomic Weights. By Edward W. Moki.ey. Published 1895. 4to, xii, 

 117 pp. 



Article III (989 J. The Composition of Expired .^ir and its Effects upon Animal Life. 

 By J. y. Billings, S. Weir Mitchkll, and D. H. Bergey. Published 1895. 

 4to, iii, 81 pp. 



Article IV (1(.)33). Argon, a New Constituent of the Atmosphere. By Lord Rayleigh 

 and Profe.ssor William Ramsay. Puldished 1896. 4to, iii, 43 pp. 



Article V (1034). Atmospheric .Vctinometr}' and the Actinic Constitution of the Atmos- 

 phere. By E. DdCLAUx. Pul)lished 1896. 4to, iii, 48 pp. 



Article VI (1126). A Determination of the Ratio (k) of the Sj)ecitic Heats at Constant 

 Pressure and at Constant Volume for Air, Oxygen, Carbon-Dioxide, and 

 Hydrogen. By O. Lummer and E. Pringshkim. Published 1898. 4to, v, 

 29 pp., 1 plate. 



'Article VII (1309). E.Kperinients with Ionized Air. By Carl Barus. Published 1901. 

 4to, X, 95 ]>p. 



Article VII[ (1373). The Structure of the Nucleus, a Continuation of '' E.^periments with 

 Ionized Air." BvCarlBauus. Published 1903. 4to, xiv, 176 i)p. 



"Article IX (1413). On the Al),-iorption and Emission of Air anil its Ingredients for Light 

 of Wave- Lengths from 250 //// to 100,"./i. By Victor Schumann. Published 

 1903. 4to, iv, 30 pp., 4 plates. 



XI 



