BY, - 6 
~ Viti De Vogel’s Color Theory; by M. ©. Lea, 
ITX.—On a new Crinoid from the Cretaceous fartoation of the 
lh hm ea a om Bln ee ee. ri aT 
"G ary 
Botan any and Zoology.—Tree-P| Pantie Prizes for Arboricilture, 7 3.—Hetero 
CONTENTS OF VOLUME XIT. 
NUMBER LXVIL 
Art. I,—Contributions to Meteorology, being results derived — 
n examination of the Observations of = ove S. ee 
nal Service, and from other sources ; by Extas Loomis,-. 1 
if, —The Colorado bere i as a Field Sor Geological 
y; by G. K. Gu 
UL. Notices = Recent eerie Rae Earthquakes ; ; by C. @. 
ee an Bee Rite ee 
LV, ers diacniec. a Vanadium Mica ; by J. Bua 31 
V.—On some American Vanadi um Minerals; by Fr rs awe: 32 
VI—On a Dinease of Olive and Orange Trees, mite in 
California in the Spring and Summer of 1875; by W. G. 
EARLOW, |. : . cesoegcius ce, 
Yee —On the Reaction of Sulphuric “Acid upon ‘Tri-caleic 
Phosphate; by H. P. Arms 
West; by G. B. Grease 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—True Ethyl Sulphate, MazurowskKa, 5 —Anthraflevic 
and Isoanthraflavic acids, ScauNK and ROEMER: ieipliouarhinine CLEVE 
Evolution of Hydrogen by the action of Zinc upon neutral Copper sulphate, L. 
EYER, 51.—Decomposition of Ammonium nitrate by heat, BERTHELOT, 52.— 
atl pegs tea = 56.—Magnifying Glass, J. Browning: New Bria 
IN, 57. —Electro-magnetic Rotations. W. Sporrisw 
nee ae ecent Discoveries of Extinct Nenstale be ‘Pilea 
—Report upon Geographical and Geological Explorations and Surveys 
eridian, 6 istori i i 
west of the 100th Meri 1.—Historical Sketch of Geological Explorations in 
Pennsylvania and other Sta nd Annual Repo a 
Agricultural pe of Texas, 63.—Prim lof Sea via: Glacial —_ 
Ice Age in itain : soe). of Spitzbergen, 65.— 1 Eras of India, 
nd a Pe: oe sic Glacial Peri raptoli Region of eruptive 
‘ocks of the District of ae Hungary: Volcanic Phenomena of the Alps, 
39.—Reliquize Aqui manites dentata, sd Dr. S. T. Bar , 10.— 
Note by Dr. Hayden, oa tb ore-bearing rocks of Colorado: Geo ology of Sumatra: 
Bulletin of the U. 8. National Muse 
I 
€ 
I 
Report of the Geoluey al of Wis a Se a ane for Students and General R, Readers 
] 
iiber Dolomit: Pittsburgh Meteo ay at ,F A. GENTH, ro 
morph- 
ism in Epigzea, A ges on chat “Fone of the Norwerian Flora during 
wth Rainy and Dry P. aie Plantarum, 4 toh iy of Cal- 
