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CONTENTS. 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics—On Torsion and its ae to Magnetism, 432.—On the densi- 
ties of vapors at high temperatures, 435.—On organic compounds which contain cardia 
456.—On the isomorphism of stannic, silicic, phe zirconic acids: On the equivalent of 
manganese, 437.—On the equivalent of nickel: On an easy mode of preparing metallic 
chromium, 438. 
“Botany and Zoology.—Two new Genera of Dicecious Grasses of the United States, by 
Georce Enceumann, M.D., 439.—Trichomanes Saga means 440.—Thesaurus 
Capensis: or Illustrations of the South African Flora, ete., by Witt1am H. Harvey, 
1.D.: Grisebach’s Outlines of Systematic Botany, for ‘eademical Instruction, ete., 
Struct wth 
1858: Bidrag till Kiinnedomen om Skandinaviens Amphipoda Gammaridea af R. M. 
Bruze ius, 445. 
Astronomy. rite ga snc between Mercury and the Sun, 445.—Shooting Stars of 
August 9-10, 1859: rvations at Boston, Mass., oy Prof. Twinine : Observations st 
Chicago, IH, $y Mr. eet BRADLEY wail others, 4 
one ae, ee Intelligence.—Earthquakes in California during 1858, by J. B. 
sk, M.D., 447,—Eruption of nt Hood: Improved mode of preparing Diatoma- 
TOPHER JoHNsTON, M.D,, 448.—Proposition fora Humboldt Fund for 
cae iveiigaieen and Travels, 449.—The 29th meeting of the British Associa- 
tion e Advancement of Science: Prof. Dana’s departure fur Europe: Prof. 
ers return from Europe: Government Scientific Expedition in New Mexico: 
Journal of the American Oriental ap 450.—Obituary.—Death of Prof. Carl Ritter: 4 | 
Death of Dr. Grailich, 451.—Index, 4 4 
ERRATA. 4 
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6, ", side is a,” between “ other and branch.” A 
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» 291, bottom, for cy eel read “ Hecker. os . 
403, . rome copie) 8 lines ‘from bottom, for “ Anpreas,” read “ Anpras.” 
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