Viil CONTENTS. 
NUMBER CVIII. 
Arr. L.—Photographing the Spectra of the Stars and Planets; 
by Henry Draper, 
y RAPE 
LI.—Artificial Fertilization of Oyster Eggs, _ mies sass 
een 
We ee eee ee ee ee Be eee Hee eee tee 
of the American Oyster; by W. elon 425 
LIl.— Origin of the Less; by G. C. Broapuerap, -_-------- 427 
LUI. Say bares! on the planets Hersilia: cad Dido; Oe 
LIV. —Triple Cheever with ‘complete ‘Color Correction ; : 
by C. 5. Hastines, aig cah ws ese 6 een 
LV.—Geology of Virginia ; by J, Le, Capkn,5. 6 2 435 
LVL. 26 lwtee! and Tatensity of the Rays emitted by Glow- 
ICHOLS, - 446 
ing Platinum; by 
LVIL-—Reecent additions to the Marine Fauna of the Eastern 
Coast of North America; by A. E. Verr 
LVIUL— = eee of Galisteo Creek, New bt ae “by. ae 
fe er + 
LIX.— Scpcoloey "of Catoosa Co., Georgia ; by A. W. Voapzs, a 
LX.—New Jurassic Reptiles (PI. 3); by oO. C, Marsa, ..-- 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Electrolysis with Alternating Currents, DRECHSEL, 477. 
—Basicity of Dithionic or ee phuric Acid, KouBg, 478 8,—Non-existence + 
Pentathionic acid, Spring: Atomic Weight of T ellurium, WILL 
ration of aon elyeal & aged , a BELOHOUBEK: Skatol, BRIEGER: 
Syotieds. of Lactos 
and Natural yeni ak Survey of Canada, A. R. C. Senwyy, 
th 
Genaue Pepe lai der Epidot-K stalle aus der Knappenwand im oberen 
Sulzbachthal, N. von KoxscHarow: Canadian Apatite, C. Horrmann: Euca- 
‘ M 48 ; sae 
lyptographia, F. v. -—Monographie Pha amaru mi, 
NDOLLE and ENGLER, 486.— Anatomie Comparé = Feuilles chez quelques 
oe Familles de Dicotylédones, DeCanpOLLE: Bentham a’ ooker’s Genera Plan- 
 tarum, 487.—Chesapeake Paclaaical Laboratory, a 
Astronomy.—The Minor Planets, A. N. SKINNER, 488. —Annals of Astronomical | 
_ Observatory of Harvard College, 491. 
Miscellaneous Scientific Intelligence. Geological Survey of the —_— Laepmyy: 492. 
than ical Time, 
: b ate 
Pye ‘ ae and gar W. K. Ciirrorp, 497.—The Mound Builders, 
ae. : Maps of the U. 8. Geological and Frecgenpkion, oe of the 
toten to ¥. HayYpen, 498.— Obituary: J. Clerk Maxwell, 4 
