674 INDEX 



Vol. Page 

 On the Recovery of the Elastic Properties of a Plati- 



num-iridium Wire XVIII, 115 



A Method of Determining Whether the Restoring Tor- 

 que is Proportional to the Torsional Strain During 



the Vibration of a Torsion Pendulum XIX, 189 



An Attempt to Detect a change in the Heat Con- 

 ductivity of a Selenium Crystal with a Change in 



the Illumination XXII, 329 



A Physical Representation of the Summation of Cer- 

 tain Types of Series XXIII, 187 



On the Variation in the Reflecting Power of Isolated 

 Crystals of Selenium and of Tellurium with a Varia- 

 tion in the Azimuth of the Incident Plane Polarized 



Light XXIII, 179 



On Certain Elastic Properties of Drawn Tungsten 



Wires XXIV, 207 



and Brown, F. C, The Adaptation of Selenium to 

 Measurements of Energy too Small to be Meas- 

 ured by Other Devices XXI, 259 



and Oehler, A. J., Notes on Certain Elastic Peculiari- 

 ties of Phosphor Bronze Wires XXII, 321 



Sigourney Deep Well, H. P. Bain I, 77, 36 



Silage, See Molds. 



Silica, Determination of, N. Knight XIV, 201 



Silver Nitrate, See Ethye Iodide. 



and Platinum, Coefficient of Absorption of Photo- 

 electrons in. Otto Stuhlman, Jr XXV, 61 



Simblum SvhareocepJiahim in Iowa, H. S. Conard XIX, 103 



Simpson, Howard, E., The Accretion of Flood Plains by 



Means of Sand Bars X, 54 



Simpson College, Storage Battery at, J. L. Tilton XII, 139 



Well, Pleistocene Record of, J. L. Tilton XVII, 159 



Sioux City, See Till. 



Water Supply, I, A. N. Cook and C. F. Bberly, IX, 90; 

 II, A. N. Cook and W. J. Morgan, X, 122; III, A. 



N. Cook XI, 133 



Sioux Falls, Wisconsin Drift-plain near, J. E. Carman. . . . XX, 237 



Sioux Quartzite, Flora of, B. Shimek IV, 72; V, 28 



Opinions Concerning Age of, C. R. Keyes II. 218 



Siren lacertina, Anatomy of, H. W. Norris XX, 291 



Cranial Nerves of, H. W. Norris XVII, 223 



Sirrine, Emma, Structure of Seed Coats of Polygonacese II, 128 



A Study of the Leaf Anatomy of Some Species of the 



Genus Bromus IV, 119 



and Pammel, Emma, Some Anatomical Studies of the 



Leaves of Sporobolus and Panicum Ill, 148 



Sirrine, F. Atwood, A New Species of Pemphigus Occur- 

 ring on Thorn I, /F, 129 



