CONTENTS. 



Number 57. 



Page 

 Art. XVIII. — Gas Thermometer at High Temperatures ; by 



L. Holborn and A. L. Day.. 171 



XIX. — Certain Schists of the Gold and Diamond Regions of 



Eastern Minas Geraes, Brazil ; by O. A. Derby 207 



XX.— Monazite ; by O. A. Derby... 217 



XXI. — Spectra of Hydrogen and the Spectrum of Aqueous 



Vapor ; by J. Trowbridge 222 



XXII. — New Effect produced by Stationary Sound- Waves ; 



by B. Davis 231 



XXIII. — Interesting Developments of Calcite Crystals ; by 



S. L. Penpield and W. E. Ford 237 



XXIV. — Method of Measuring Surface Tension ; by J. S. 



Stevens 245 



SCIENTIFIC INTELLIGENCE. 

 Geology and Mineralogy — Glacial Gravels of Maine and their associated depos- 

 its, G. H. Stone: Illinois Glacial Lobe, P. Leverett, 247. — Geography of the 

 ■Region about Devils Lake and the Dalles of the Wisconsin with some notes on 

 its Surface Geology, R. D. Salisbury and W. W. Attwood, 248. — Moraines of 

 Southeastern South Dakota and their Attendant Deposits, J. E. Todd : Prelim- 

 inary Eeport on the Copper-bearing Rocks of Douglas County, Wis., U. S. 

 Grant: Bulletins of the Geological Survey of Einland, J. J. Sederholm and 

 V. Hackmann, 249. — Analyses of Rocks, Laboratory of the IT. S. Geological 

 Survey, 1880 to' 1899, E. W. Clarke, W. E. Hillebrand and H. N. Stokes: 

 Bjurbole, Finland, Meteorite, 250. 



Obituary— Professor G. H. F. Ulrich, F.G.S , 250. 



