Bah OI SS SATS eT ae a pe SS a oe LON Oe 
CONTENTS. Vv 
XIX.—Seleniocyanates ; saasivein howd Estimation of Mereury 5 ; 
pecific Gravity Determinations y F. W. CrarKke,... 199 
X.—Notice of recent additions to ‘die Marine Paine of the 
Eastern coast of North America; by A. E. VERRILL,.-- 207 
XXI, Hag Pe of the Comet discovered by Mr. Lewis 
Swift; by C. « Perens;. osc wets 215 
XXII. LEW ayeHY Gr oup in Cent tral Ohio; by L. E. eget 621 
XXIII.—On some aah We Fossils from Southeastern New 
foundland ; cs tee ai Wik pies ioGbe Saami 224 
IV.—Solar *Bclinee of July 29th, 1878; by H. eset 227 
XXV. artes bea of an he eae i "Plows by Jame 
ee ee ee 
TSO 
XXVI. parts Fieiclaciyt from the Jurassic of the AOS 
Mountains; by: 0. C. Mansa, oo ecces seveccieel sks 
SCIENTIFIC INTELLIGENCE. 
gree ee Geology: by ARNoLD Hague and 8. F. Emmons, 234.—Flora Aus- 
N: poy d. BB 
Annual Report ee the United States Ento ss eg Commission, for the year 
1877, ss to the Rocky Mountain;Locust: On the young stages o us 
re shes ; by ALEXANDER AGASSIZ, 241,—Results of the Recent Eclipse; by C. 
A, Young, 242.—Institute of aes Annual Meeting of German Naturalists 
and Physicist 8, 246. 
NUMBER XCIV. 
Page 
Arr. XXVII—Morphological Laws of the Configurations 
formed by Magnets floating Phere Be and subjected to 
the attraction of a superposed magnet ; by A. M. Mayer, 247 
—On the presence of Dark Lines in "the Solar Spec- 
trum, which correspond closely to the lines of the Spec- 
trum of Oxyge en; OHN CHRISTOPHER Draper, ..-. 256 
—Correction for Vaenum in Chemical Analysis; by 
Gee, PECL RR out ssc: . sae 265 
—On the —— of the pis Meteoric Mineral 
Daubréelite; ty J Lawntnon Burr, 022-.-> > 65-5 270 
XXXI—On the Artificial Mounds of ae eceioee See and 
the meoier of the employment of a Unit of Measure- 
ment in their erection; by W. J. McoGrg, .--- ..----- cae 
XXXIL—Observations upon the Solar Eelipec of July 29, eee 
