iv CONTENTS. 
NUMBER CXVI. : 
ag 
Art. [X.—Effects produced by mixing White with Colored 
Light; by O. N. Roop,.--- 81 
X.—Some Phenomena of Binocular Vision ; oy de LeConTe, 83 
XI.—Bernardinite: Its Nature and Origin; by J. M. SrreLMAN, 93 
XIL roa a = searches on the Lunar ies ; by J. 
Sro aiGiacaas 5 aw 95 
XII. — Aqueous Vapor i in Relation to ) Perpetual § Snow; ‘by 
ROL 
XIV. “Pashaton and Eccentricity ; by R. W. McFarvanp, 
(With Plate IIT), - ee 
mV Crystalline’ Danburite from ‘Russell, ‘St. Lawrence 
ounty, New York; by G. J. Brus an dE. ANA,.. 111 
XVI.—Photograph of Jt upiter’s Spectrum, showing Evidence 
of Intrinsic Light from that Plane y H. Draprg, - -- 
XVII.—Spectrum of the Flame of Hy aroas by W. Huearnys, 121 
XVIII.—Determination of the Acceleration due to er A 
of Gravity, at Tokio, Japan; by T. C. MenprEnnar 124 
XIX.—New Species of Pterichthys, allied to Bothrops 
ornata; by J. F. WurrEaves, 132 
ew Meteinie Mineral (Peckhamite), and some , addi- 
tonal facts in connection with the na of Meteorites in 
wa, May 10th, 1879; by J. L. Smnra,.__. -..-._.--.-- 136 
XI" The Ha Earth as a Conductor of “Electricity ; by J. 
ricete biog Werwiare 6 mies 6 Ga wee ou awl) ae 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Chemical Curves as Lecture-Ilustrations, Mruus, 1 
Estimation of Zine and Zine-dust, BEemsTern and JAWEIN, 142.—Reflection 
IRARD: 
ed, 
pk eatipge of Globu lint in Pota tatoes, meen Behavior of Carbonic Acid in 
relation to Pressure, Volume and Tem mipera re, R. CLAUSIUS: Kerr’s experiments 
on the relat on between Light and Bieserieity, ey a. RONTGEN, 145.—Con- 
tribution oes agusnageang Physics i ia Vacua, 146.—The law of fatigue in the 
work done by men or animal re pie of tavity at Tokio, Japan: 
Winchester Shacbineay of Tile Cone ege, 1 
Geology and Natural History—Mucovini the chief source of mineral coal, P. F. 
ReInscu, 149.—Odontornithes, a Monograph on the Extinct Toothed Birds of 
No ica, : 0 mite, W. EH. 
Himpen: DeCandolle’s Se sage. A. DECANDOLLE, a tonic os North 
; E x pe 
Bo 5 
De Oy : 
F. pz MvUsLLER: Catalogue of North American ve Rav sar A. 
Hervey, 157.—Botanical Exploration of the little- hn Week 7 Tndia Islands : 
te to Dr. C. A. White’s paper in volume xx of thie sounat R. E. Can, 158. 
Packard's Zoology, 159. 
Miscella Scientific Intelligence. Talore gs nase of vrs —— 159. ae” 
A weekly Record of Scientific Progress, J. Miou ce Record, 1 
Obituary.—Count Louis Frangois de Pourtales: “alana Eduard Grube, 160. 
