* 
lV CONTENTS. 
Page. 
XVI. Evidence of Two distinct rages Formations in the 
Burlington eee by W. H. Nines and Caar.es 
WacusmuTH, - 
XVII. On a proposed Printing Ciirondeeply$ by Prof. C. A. Satie. 99 
XVIII. Note on the geological position of Petroleum reservoirs in 
Southern Kentucky and in Tennessee ; by Prof.J.M.Sarrorp, 104 
XIX. Analyses of some minerals from the cts mine of Ches- 
ter, Mass. ; by Dr. C. T. Jackson, 107 
XX. On the detection of Iodine; by M. iki bas oe ae 
SCIENTIFIC INTELLIGENCE. 
istry and Physics.—On the preparation of Hydrofluoric Acid, by W. P. Dexter, 110. 
—Skylight Polarization at Philadelphia, by PLiny Earue Cuase, A.M., 111.--Compar- 
ative visibility of Arago’s, Babinet’s, and Brewster's Neutral Points, by PLiny EarLe 
pte A and Geology.—On the age of the gold-bearing rocks of the Pacific Coast, by 
the Chief Commissioner of Mines for the Province of Neva Scotia, by S. P. Hamitton: 
Geological Survey of Nova Scotia: Sulla Geologia dell’ Italia centrale: Petroleum 
on the Alleghany River: Orographic Geology, or the Origin and Structure of Moun- 
tains, by Georae L. Vose, 123--Dentex Miinsteri, specie di Pesce i cui resti fossili, 
etc., Prof Giuseppe Menecutnr: G. F. Matthew on the Azoic and Paleozoic rocks 
‘of Southern New Brunswick: Meteorites, 124.--Annotated Catalogue of the principal 
Mineral species hitherto recognized in California, etc., by Wm. P. BLake: Die Mine- 
rale der Schweiz, von Dr. Avotr Kennecott: Notes on some members of the Feld- 
- family, by Isaac Lea: Vorlesungen tiber Mineralogie, von N. von KokscHa. 
w, 125.—On the affinities of eine Caalde: by F. B. Meex, 126. 
Pr and Zoology —Boussingault’s Researches on the action of Foliage, 126.—Revision 
of the North American species of Juncus, by Dr. ENcELMANN: Lessingia germano- 
rum, 128 —Illustrations of the Esculent Fungi of the United States: Death of William 
Henry Harvey : The International Horticultural Exhibition, 129.—Illustrated Catalogue 
of the Museum of Comparative Zovl logy at Harvard College, by ALEXANDER AGASSIZ, 
132 —Fossil Meduse, 133--Polymorphism among Bryozoa: a a and ds Saree 
of the ‘Vorticeitidan: Parasite: of ‘Hydra, by Prof. H. J. Cua Baird's 
Birds : Notes on the Embryology of Starfishes, by pice sees sei 
ee —Asteroid 86), 134 —Asteroid (87) ; The new variable star, 135. 
ientific Intel — Destruction of Scientific Museums by Fire, 135. -- 
Walid Prizes : Rumford fo Prof. H. A. Ward’s Collections of Casts of Fossils, 
136.—Obituary.—Henry Darwin Rogers, 136. 
oe Bibliography.—Transactions of the Connecticut Academy of Arts and Sci- 
: The American Annual Cyclopedia and Register of important events, 138.— 
i Chamber's Ene peti: Annals of the Dudley Observatory: Snell’ "3 
139,—Notices of New Works and Proceedings of Societies, 140. 
