CONTENTS. 



Number 183. 



Page 



Art. XIX. — Transmission of Light through Transparent 

 Inactive Crystal Plates, with Special Reference to 

 Observations in Convergent Polarized Light ; by F. E. 

 Weight 15V 



XX. — Separation and Estimation of Barium Associated with 

 Calcium and Magnesium, by the Action of Acetyl Chlo- 

 ride in Acetone Upon the Mixed Chlorides ; by F. A. 

 Gooch and C. N. Boynton --. 212 



XXI. — Feldspar Aggregate Occurring in Nelson Co., Vir- 

 ginia ; by W. M. Thornton, Jr. 218 



XXII. — History of the Coconut Palm in America; by O. F. 



Cook - --- 221 



XXIII.— New Mink from the Shell Heaps of Maine ; by F. 



B. Loomis -227 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Mesothormm, W. Marckwald, 230. — Combustion 

 of Hydrocarbons, W. A. Bone : Supposed Chemical Distinction between 

 Orthoclase and Microcline, Vernadsky and Revoutsky, 231. — Preparation 

 of Argon, G. Claude : Die Stellung der neueren Physik zur mechanischen 

 Naturanschauung, M. Planck : History of the Cavendish Laboratory, 

 1871-1910, 232.— The Principles and Methods of Geometrical Optics, J. P. 

 C. Southall, 233.— Chemisette Krystallographie, P. Groth, 234. 



Geology and Natural History. — United States Geological Survey, 234.— Pub- 

 lications of the U. S. Geological Survey, 235. — Bureau of Mines, J. A. 

 Holmes : Florida State Geological Survey, 236. — The Badland Formations 

 of the Black Hills Eegion, C. C. O'Harra : West Virginia Geological Sur- 

 vey, I. C. White: New Zealand Geological Survey, 237. — Geological 

 Survey of Western Australia, 238. — PalEeontological Contributions to the 

 Geology of Western Australia, 239. — Report of the Vermont State Geolo- 

 gist for 1909-1910, G. H. Perkins : Contribution to the Geologic History 

 of the Floridian Plateau. T. W. Vaughan : Recent Discoveries Bearing on 

 the Antiquity of Man in Europe, G. G. MacCurdt, 240. — Fossil Faunas of 

 St. Helen's Breccias, B. S. Williams, 241. — Palssontologia Universalis, 

 242. — Botanische Tropenreise, Indo-Malayische Vegetationsbilder und 

 Reiseskizzen, G. Haberlandt : Plant Anatomy, W. C. Stevens : A Text- 

 Book of Botany and Pharmacognosy, H. Kraemer, 243. — Biology, general 

 and medical, J. McFarland, 244. 



Miscellaneous Scientific Intelligence — Carnegie Institution of Washington 

 Year-Book, No. 9, 1910, 244. —Publications of the Carnegie Institution, 

 245. — Annual Report of the Board of Regents of the Smithsonian Institu- 

 tion, 246. — Publications of the Allegheny Observatory of the University 

 of Pittsburgh, F. Schlesinger : Bref och Skrifvelser af och till Carl von 

 Linne" : Seismological Society of America, 247. — -Das Electrokardiogramm 

 des gesunden und kranken Menschen, F. Kraus und G. Nicolai : Plane 

 Trigonometry, E. R. Robbins : Shop Problems in Mathematics : Ostwald's 

 Klassiker der Exakten Wissenschaften, 248. 



Obituary — Sir Francis Galton : Dr. M. Wilhelm Meyer, 248. . 



