a CONTENTS. 
XIII. On the aca new element, ‘ane by Prof. J. Law- 
RENCE SM 95 
XIV. On a Isomorphism af Sphene and Budlase’: by Jans 
Al 96 
XV. Characters of Tetraclea, a new genus of Verbenaces by 
Asa Gray, M.D., 97 
, 
SCIENTIFIC -INTELLIGENCE. 
Correspondencez—Correspondence of M. J. Nicklés : epee Light, 99, ek ae 100. 
—Quinidine: Racemic acid, 101.—Metacetic acid, guste Lau —Re- 
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magnets, 110—QOn Inductive Electric machines and on a simple means of increasin ‘ 
— effects, Ill, —On we chemical reac ‘tions important to health in populous cities, 
—On esigns by means of the Vapor “— dine, 
13 —On the application off ety acids to illumination: Different memoirs ig rches 
m the presence of boracic acid in mineral waters: On Phycite, by M. Lamy the 
domnpelanion of the air confined in vegetable mould, 114. 
Chemistry and Physics.—Speeific heat of gases and vapors, 115.—On the decomposition of 4 
éertain organic acids: New organic radicals containing oy Bhatt a new series of 
organic bodies which contain metals, 11 Nes on Ozone, 
Geolo, Inu f the Delta of the Mississippi, 120. te da ees sur Ja cham 
Géslouique ne asteche Provinces de l’Espagne, par MM. pe VerNerviIL et CoLLoms, 
age d'une description de quelques Ossements Fossiles io Te errain Mivetue, par 
M. P. AUL Gervais, 124.—Palwontology of New York; by James Haut, 1 
Botany and Zoology —F on Cestrica ; an Herborizing re for the Young Botanists 
of Chester County, sit y Wu oy play: ada LL.D.: Fun gi Prt reigg og og 
ont} “ie ep ities of the Mee finns sslaee form the basis of © — 
all v lean Membranes: OFMEISTER, On the Development of Zostera: Horsfield, 
lante Ja oe w Rariores, ete. ; elab. J.J. Bennetr et R. Brown ei err Spe- 
es Filicum, being Descriptions 0 of all known Ferns: N. B, War p, F.R.S., &c., On the 
Growth of Pines in rte apart Cases: 132.—Infusoria of California : facie Re- 
searches of Prof. AGas 
Aen a. —New Planets, (24) (25) 136.—(26), 137.—First Comet of 1853: Second Comet 
1 
1852, by Professor S. P. L rop, M.D., ples able Clo et Tooth of Ge- 
talodus Ohioensis, by Pro M. Sarrorp: Products of the Swedish Mines in 1849 
Quarterly Journal of Microscopical Science : he Application of Photography to 
the Representation of Microscopic Objects, 142.—On aire uced by the 
disintegrated surfaces of crystals, by Sir Davi - neigh Borealis: Me- — 
ric stone Lixna: American Ass oe e Advanwoiibleh ¢ of Science, 48— — 
Obituary. —Death of Dr. Lewis C. Beck, 14 
Bibliography. —A History of the Fishes of po mag ain by Davip Humpnreys Storer, 
M.D., A.A-S. pes Principles of = d Physiological Chemistry, trans- 
ted by Dana eL Breep, M.D., 150.—A nal of ‘Scientific Decora, or Year- A 
SS, Wilkes, U.S.N, ie James D, Dana — Pico oe a psa het he oman ae 
of Arts 
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by James D. Dana: Report ‘on’ the Crnss ea of the E ee Expedition arr 
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