CONTENTS. Vv 
NUMBER XV. 
Page 
Art. XX.—The Hot wb ir and Geysers of the Yellow- 
stone and Firehole Rivers; by F. V. Haypen, - -- -- nade T61 
XXI.—On the Electrolysis of the Substituted Derivatives of 
Acetic Acid. Preliminary Notice; by Dr. G. E. Moorn, 177 
XXII.—Green Mountain Geology. On’ the Quartzite ; by 
damm DD. Dawa, oo. soe e a we a 179 
XXIII.—Brief Contributions to Zodlogy from the Museum 
of Yale College. No, XVIII.—On the Affinities of Paleo- 
a Tabulate Corals with Existing Species; by A 
i gevGunine «Glue iene 187 
XXIV. -Gockigiog! and Mineralogical Notes on some of the 
Mining Districts of Utah Territory, and especially those 
of the en and Oquirrh Ranges of Mountains; by 
B. Snaiman) ds osass sea ook eel ak egeoeae 195 
XXV.—On ‘the enera Cornulites and Sacer, and on 
anew genus pet cere, ; by H. A. Nionorson, 22 202 
XXVL ~—On the Meteo of the Bahonea’ “ La Concep- | 
tion” and of San ners y Juan Ureinnt 207 
XVII.—On the Mean Motions uf Jupiter, Saturn, Uranus 
and Neptane; by D.. Rime woot, 2.2 4-2 sscl science 208 
XXVIIL.—Brief Contributions to Zotlogy from the Museum 
of Yale lege. No. Recent Additions to the 
Molluscan Fauna of New England and the adjacent 
waters, with notes on other species; by A. E. Verrim1,.. 209 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics. Beet an essential improvement in the method — a 
en LiNNEMANN: On the preparation - Abso a oe 
214.—On the action ot tight me Chlorine and B orn “Os the 
Ammonia-platinum Bases, CLE 5.—Ca silane sisencdinks Ot skdow, 217, 
Geology and Natural H: —Geological Survey of Ohio. Report of Progress in 
1870, 218.—On new Tree Fern s and other Fossils from the Devonian, DAWSON. 
22 
fossil 
Corr: Illustrated Catalogue of the Museum of Comparative Zoédlogy. Su ae 
ment to the Ophiuridz and Astro nv Fe 224. 
Astronomy.—Eclipse of the As Dec. 12, 1871, JANNSEN: On the Solar Eclipse of 
Dec. 12, 1871, LCT EN, 2 a ‘of the a, Observatory, 230. 
SE, xico, 23 
the Meteoric Collection co Charles Upham ene 236,—The tictord Medals, 
237.—Light of the bottom of the Ocean: Manna from a Linden in the Vosges, 
BovssINGAULT, 238.—Hailstones of salt and sulphide of iron: Temperature of 
the Sun, 239. 
Miscellaneous Bibliography.—Catalogue of Photographic Illustrations by Wm. H. 
Jackson: Fireside eae. a Series of Popular Scientitic Essays upon Subjects 
connected with Every-day Life, Soars ee —A Treatise on Localized Electri- 
zation, and its applications to Pathology and Therapeutics, Soneecs, The Lens, 
@ Quarterly Journal of Microscopy ps the anes Natural Sciences: Elementary 
Treatise on Natural Philosophy, DESCHANEL, 
