vi CONTENTS. 
Astronomy.—Annals of the Observatory of Harvard College, Wa. CRANcH Bonp, 
242.—Astronomical mares of Moon-Craters, Sun-Spots, e way Aurora 
Pag a os March, 243.—The Sun’s Light: The August Meteors: On tw 
ts, O.. H. PETERS, eng oe of star-shine, night- light, the 
Godincal Tight, C. Prazzi-SMYTH, 2 
Espana Scientific Intelligence.—List ~ Elevations and Distances in bo 
portion of the United States west of the Mississippi River, C. cas 
246. rEtfec t of change of barometric ans on human beings: The 
ature and Rainfall of July, 1872, C. Keurgen, Jr: A Manual “Quali. 
tative Analysis, RoBERT GALLOWAY, 248. 
8, 
NUMBER XXII. 
Page 
Arr, XX X.—On the nature and duration of the discharge 
ON age N. Roop. Part IIL (To be continued. - 249 
XI. —0n ithe Guinot and Embryology of ebro 
lina ; ArD 8. Morsx, Ph.D. With Plate III.... 262 
XX xi mtu of the Errata, or “A Few Millions 3” by 
AtFreD M. Mayer, Ph.D., 2 4 
ee 
leable Iron;” by Russet W. Tirumedie ig) + SREB apie 270 
XXXVI. —Deseriptions of a ite new species, and one new 
enus, of Silurian Fossils, from Ohio; by = B. Merx,.- 274 
XXX VII.—Discovery of a New Planet ; : by C. H . F, Perers, 281 
XXXVIIL.—Adadress before the American Association at its 
recent oo in Dubuque, lowa; by Asa Gray,------ 282 
aN —Preli rere fetter oe of New Tertiary Reptiles ; 
C. Mar 2 
SCIENTIFIC INTELLIGENCE. 
istry and Physics.—W ater not = _Bieetrolyte, 3 0.— ahp od Examination of 
the new Platinic bemedap Norton: On the pad of Chl Wurtz and 
Voer, 312.—On w Organic avis obtained from Dulcite, ‘avcaiaba’ S13. 
Geology and No 1 His am —Hayden Rocky Mountain Geological Expedition, 
313.—On the teas Valley . Karthquake, 316. ocagrmge ais rface 
Geology of Northwestern Ohio, WINCHELL, 321.—Note n Tinocera ceps, 
Marsu: A spe ag of the Fossil Crustacea belonging ‘to the Order ‘Meros 
tomata, Wi Notice of a 
new species of Tinoceras, MARSH 
— A Life Slide, 333. 
—Extract from the Address of Mr. De La Rue a the British As- 
‘oclantis: 324.—Report on Lunar Obj suspected 0 ange, Birt: Aurora 
esgeine 326. eid of the ‘equatorial bands of Jupiter: The Object-glass of 
Allegheny Observatory stolen: Erratum to Prof. Kirkwood’s Article, 327, 
Miscellaneous cE de ta. e.—Meeting 0 of the Se eating = on, 327.— 
Papers relating to the Transit of Venus in 1874, 330.—Volcanic Eruption o 
Hawaii: Tider waye at the antes Islands: A General ade t to the Dice 
