| CONTENTS. vii 
j 
| NUMBER CXxX. 
: 
Page. 
Ant. XXX. On the Origin of Prairies; by James D. Dana, + 293 
XXXI. On the Construction of a Spectroscope with a number of ° 
prisms, by which the angle of minimum deviation for any 
ray may be accurately measured and its position in the so- 
lar spectrum determined; by Jostan P. Cooke, Jr., - 305 
XXXII. eb hems in Mechanical cir ; ss Pecile or 
Cna 
XXXIIL. Bias of isa: by tour M. Ssseis » es - $16 
XXXIV. Some Indications of a Northward Sf cacpneiation of 
Drift Materials in the woh Peninsula of sre vf 
rof. ALEXANDER WINCHE 331 
XXXV. On the Crystallization of Stiri, ‘lls upon che Renaiton 
between Sulphid of Se icteactn Ammonia and Alcohol ; af 
Cuartes M. WETHERILL, 
XXXVI. On the History of Eozoon Canadense, (vith a lat), 344 
XXXVIL. Notices of Earthquakes 362 
XXXVIII. On seta bicitie: Saugite, Ornithite wid cher min- 
erals of the Key of Sombrero; by Avexis A. JuLie - 367 
— i two Varieties of See — by Ausxis ie 
379 
XL. aaa; on ‘ks Volatile Hydrocarbons : ste C. M. 
ARREN, . - 384 
SCIENTIFIC INTELLIGENCE. 
Iron regions of Arizona, by W. P. BLaxe: On an oil-well boring at Chicago, by Gzo. A. 
pert Jr , 338.—On the Drift in Brazil, and on decomposed rocks under the ata 
. Acasstz--communicated by A- Agassiz, 339.—Mining Statistics of Great 
ic for 1864, 390.—Cretaceous Reptiles of the United States, by Joseru Lerpy,M.D.: 
Note on the Discovery of Rhizopods in the Azoic, by James D. Dana: Report on the : 
Mines of New Mexico, by Prof. R. E. Owen and E. T. Cox, 321.—-Defense des Coloe 
nies, by Joacuim Barranpe: Supplement to the Ichnology of New England, by Ep- 
warp Hitcucock, D.D., etc.: New Dinosaurian from the Isle of Wight: Seaside = 
Studies in Natural History, by Evizaseta C. Acassiz and ALEXANDER AGAssiz, 392, a 
--Entomulogical Society of Philadelphia: A classification of Mollusca based on the 
principle of cephalization, by Eowarb S. Morse: Natural History—A Manual of Zool- — 
ogy fur Schools, etc., by Sansorn Tenney, A.M. 393—Ona oe seen at Craw- 
fordsville, Ind., by Prof. J. L. CampseLu, 394.—British Associa — 
