CONTENTS. Vil 
NUMBER CXXXVIL. 
Art. XXXV. eed ee Sy lh of the Spectrum of the Nebula 
in Orion: by EH: DRarnk, |. 22.5... 24s ete 339 
XVI. = Mean Annual Rain. ‘fall for different Countries of 
the Globe; “by A> Wonikor, 00200 sc ee 341 
XXXVI. Ph yaolebival Optics, No. IV; by W. L. Stevens, 346 
XXX VIII.—Flood of the Conneetient ‘River Valley from 
d. De Da 36 
Page 
the Quarternary Glacier Vapi oe 0 
XX XIX.—Brazilian specimens of Martite ; . Derny, 373 
XL.—Method for determining the flexure of a Telescopic Tube 
for all positions of the Instrument ; CHAEBERLE, 374 
XLI.—Dykes of Micaceous Diabase penetrating the be 
Zine Ore at Franklin Furnace; by B. K. Emerson, ---. 376 
XLI.—Occurrence of Smaltite in Colorado ; by M. W. Is, 380 
XLIUTI.—Vanadium in the Leadville Ores ; by M. W. Izzs,_ 381 
LIV. 
xX —Conditions attending the Geological Descent a some 
Fresh-water gill-bearing Mollusks; by C. A. Wat . 882 
XLV.—Measures of the Rings of Saturn in the years 1879, 
1880, 1881 and 1882; by E. 8. HoxpmEn, -__.._--._--- 387 
XLVI.—Interference Phenomena in a new form of Refrac- 
tometer ; . A, MicHREBON, aco 396 = 
XLVII. —New Minerals, Monetite and Monite, with a notice 
of Pyroclasit e; by ©. U. Sumeanh, Sali ck 400 
XLVIIL.—Marine Fauna off New Kogiadd: by A. E. Verritt, 406 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Determination of Gas-densities, GotpscHmMipT and V. 
MEYER: Diffusion of Solids into Solids, Conson, 409.—Production cat "Aotiee : 
) {END 
Oxygen, T Hed Persul oe oxide of Berthelot, Menp F 
410.—Production and properties of met Pears SETTERBERG, 411,--Metals 
of the rarer Earths, BRAVNER: Pree of Cymene from Tepe 
Navpin: New Alkaloid from Cinchona ve HowarRp and —— , 412.— 
Coloring matter of the Chinese yellow berries, FOERSTER ot m 
tization of diamagnetic and weakly paramagnetic bod Reflection of 
electrical rays, 413.—Influence of mechanical hardening ip6 Se 
properties of steel and iron: Storage of peed 414,.—Storage o 
tricity: Velocity of Sound in Wood, H. Kayssr, 415.—The chomiaty “of 
Cooking and Cleaning, a manual for Housekeepers, BE. i RICHARDS, 416. 
Geology and Natural History.—Bulletin ~ the ne Museum of Natural History: 
Glacial-era Climate ota or, 417.—Post-Glac ip ait Quincy Syenite M, Be. 
Wapsw n old chapter of the Get peal & cord, W. Kine T Bee: 
NEY: Species of Eurypterus and Pterygotus trem Buffalo : " Chautauqua ca 
Scientific ry, ero A. S. Packarp, Jk.: Tab ve for the wpaiaig ates so Of oe 
Minerals, J. C. Foye: Female Flowers of Conifers, Eon 418,—Domestica- 
tion oes Wild Dike 421.—Conchologische sineltiuires. E. gh Manet 42205 
Mise Scientific ee. prea Annual Report of = pee - 
 nolbgy 422,— ry.—Charles Robert Darwin: E. Deso: 
