CONTENTS. Vv 
— and Mineralogy.—Auriferous Gravels of the Sierra Nevada of California, 
D. Wuitney, 145.—Richthofen’s Theory of the Loess, J. E. Topp: Tertiary in 
Massachist Bay, W. O. Crossy: Pennsylvania, Geological Report of J. H. 
C Geology of Gibra LR 
Botany and Zoology.—Report upon ie U. 8. Geographical Surveys west of the 
100th Meridian, vol. vi, Botany, 154.—The Flora of British India: Refugium 
Botanicum: bias ge and Proceedings of the Botanical i: of Edinburgh, 
155.—The Journal of the Linnean Society, 156.—Flor: issections illustrative 
of the typical Genera - as British Natural Orders, G. HENSLOw, 157.—Decease 
of Botanists: Psy 
Miscellaneous acon "aig é. Bb ect A a on the Substances which 
produce the Chromospheric Lines, J. N. LocKYER, ae eee _ Scientific 
Journal: Builetino del Voluieee Italiano, 3 ML 8. DI 
NUMBER CV. 
Pag 
Arr. XXVI.--The Pertinacity and Predominance of Weeds; 
yw Aga GRAY, : loose ee 
XXVII.—Possible cause of variation of the proportion. of 
Oxygen in the Air; by E. W. Morrny, ------ .------- 
XXVII.—Principal J. ’W Dawson’s criticism of my Memoir 
On the Structure of Hozoon a se compared with 
that of Foraminifera; by K. 
XIX. — Estherville, Emmet County, go "Meteorite of May 
10th, 1879; by (. TBs 
XX. —Co “38 Correotan of ppqeee Telescopes; by W. 
177 
XXL. ~Teeriak Moraines of the North ‘American Ice-Sheet ; : 
19 
by PHAM, ae Secs 
SX WIL.Oheervations & on 1 Planetoids; by C. HE. F. » Perens, 209 
XXXII — on the genus “Macropis 5 by W. H. 
Parr oak ee 211 
XXXIV. —  hadiional ‘Remains of Jurassic "Mammals; ‘by 
iene eo erect ek 
Oi: MARSH. oc os ye ness cambenene< 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics—Spectrum of Ytterbium, DE “Ageimue 216.—Nitrifi- 
— Warineron, 217.—Chemical ree of Alkali metal Amalgams, 
19.—Action of Dehydrati ubstances upon Ch 
its amides, BALLO, — raat Synthesis of Methyl-violet, H ASSEN: ‘CAMP : Alka- 
loids of Japanese Aconite Roots, WrigHtT. 221.—Determination of 7 Den- 
sities, 222-—Compressibiity 0 of gasses at high pressure: Elements Modern 
Chasity, by A. Wurtz, 22 
