CONTENTS. vii 
NUMBER CLXVII. 
Art. XXXIX.—Characteristics of the North American : 
Flora; by Asa Gray Se ra wie pre 2 BBS 
XL.—Columbite in the Black Hills of Dakota ; by Wm. P. 
roe eae Cee yee ga De eek nae nee ee ee 340 © 
XLI. —Spectro-photometric study of Pigments; by Epwarp 
is skewer OR ae dew ee Oae ke aan ee ae 342 
XLII. = vitiaiaen of Becker’s Theory of Faulting; by Ross 
BR. Bag wie Se ee ea 348 
XLIII.—Difference between Sea and Continental Climate 
with regard to Vegetation; by M . ato k ie 4 
XLIV.—Chemical Affinity; by Joun SARGENT OS 60 
XLV.—Relation between the Electromotive force of a 
Daniell Cell and the strength of the Zine Sulphate 
motion: by TS; CMReAge so eo co ee ces ue 373 
LVI—Notice of the remarkable Marine Fauna occupying 
the outer banks off the Liang Coast of New England, 
NG: 20s by A. ELV emetity  Oosa cee ao 377 
XLVIL.—Note on the Cortlandt and Stony Point Horn- 
blendic and Augitic rocks; by James D. Dana,__._-.. 384 
SCIENTIFIC INTELLIGENCE. 
Physics.—N ational Conference of Electricians, 386.—Determination of Vapor 
density of bodies with low boiling points and bodies with high boiling points: 
Wopuel elements for Electrometric ee eat ae 390.—Wave-lengths in the 
Infra-red portion of the solar spectrum, 391. 
Geology and Natural History. —Uatersohnges uber die oe terete altkrystal 
linen Schiefergesteine, J, LzHma 92.—Note on the origin of bedding in so- 
metamorphic rocks, J. DT Dana, 393.—G eology of gots County, seri 
EK. V. D’INVILLIERS, 396. ie on the Sania g of Limonite ore beds, 
398.—Glacial Studies, F.-A. Foret, 400.—Sketch of the Geo eological History 
MACKINTOSH, 401.—Stibnite from J apan: Flora shore fase. XCIIT, 402.— 
rilisa: Frureo PARLATORE, Flora taliana, continuata da oro Caruel: The 
Agricultural Grasses of the United States, G. Ta Descriptive Catalogue of 
the North American Hepatice, North of Mexico, L. M. UnpERWooD, 403. 
Miscellaneous Scientific Intelligence. Ponape go determinations of Stellar Parallax 
in the Southern pop wont = Grit and W. L. ELKIN, 404.—The Materials of 
Engineering 3 : Tre ali on the Adjustment of Observations, 
with aichanicnd to Gooteae’ work and other measures of Precision, T. 
Wrigat: Meeting of the —peraatheiat Congress at Washington, 405.—M ing 
of the National soe sos of Sciences at Newport, R. I., October 14, 1884: 
French Academy of Sciences: The Young Mineralogist and Antiquarian, 406, 
re 
