iv CONTENTS. 
servatory, a serra Review of Astronomy: An Elementary Treatise on Ellip- 
tical Functio 
Miscellaneous Si es Intelligence.— American peepee New American Scien- 
tific Sepa, 76. —FKarth barca age wave: Treatise on Lightning Protection: 
Natural Philosophy for Be a 3, 77.—Vermont Toad of Agriculture, Manu- 
nett and Mining: Wisconsin ‘ewes my of sprees Arts and Letters 
my of Natural Sciences of Phila a telpi 738.— bituar ry. Elkanah Billings, 78. 
“e Jewett: P. P. Carpenter: D. Owen, 0. 
NUMBER LXXX. 
Art. XIV.—Discovery of Oxygen in the Sun by Photography, - 
and a new — ote of the Solar Spectrum (eth Plate V1); 
by H. Dra 
AY. = Medion of of eal Organic Substances in ‘increasing the 
ensitiveness of Silver Haloids; by M. C. Lra,_---.--- 
XVI.—Critical Periods in the eee! of the aia ’and their 
Relation to Evolution; by Joserpn LeCon 
XVII.—Notes on the internal and external struct of Pale- 
ozoic Crinoids; by Cuartes WaAcHSMUTH, ---. ------ 15 
Niger emical constitution of Hatchettolite ‘and Samar- 
: by. Os0an VD. AtLaN, .. o.4-~ ceneen ones ol sed 
XIX. poisons of the Geology of Vermont to that of Berk- a 
shire; by James D, Dawa, 22505259; 305 4~- ---~ a0 42h 132 
—A proposed new method in Solar Spectrum Analysis ; 
y 8S. P. Lanerey, - 140 
XXI.—Note on the Exactitude of the French Normal Fork ; 
by Rupotepn Kornie. 
9- ccc ore 
SCIENTIFIC INTELLIGENCE. 
Chemistr —On the Heat of Combustion of Oxygen and Hydrogen in 
closed veiselk “THay, 148.—Va ee volumes and Av sogadiee Law: Plato-diiodo- 
ILSON, u 
Pyrotartaric Acid, Bour 50.—Polybasic a. ‘obtained by the action of 
Carbon dioxide on Phenol tie Relation of Cystin to Sulphates in the Urine, 
_ Niemann, 151.—Gauss s Theory of Capillarity: Influence of Light upon the 
lectrical resistance of Metals, BOrystern: Chemical and Physical Researches, 
THOMAS bpm, 152 
Geology an alogy.—Bulletin, Ms iii, No. 3, of Hayden’s Expedition, 154— 
The Coal Mine of the Western Coast of the United States, W. A. GOODYEAR: 
the conditions influencing the projection of discrete solid 
: g . 
materials from Voleaneit: : The Geological Survey of Portugal, 157. —Earthquake 2 
i i cal ef 
Botany and Zoology.—Some points of Botanical Nomenclature, 158. < Athecoaatli 
Chinensis L.: Re rium Annum Literature Botanicse periodicee curarunt 6. 
. W. BrowNensteG, 160.—Sir Joseph Dalton haag Ae nd party on Botanical 
excursion to the ocky Mountains and California: The Influence of Phyaeat 
itions in the Genesis of Species, | JOEL ri ‘Alum: Sir Wyville Thomson, 
and the working up of the “ Challenger” collections, 161.—American Addresses, 
with a Lecture on the study of Biology, Tomas H. Huxuey, 162. 
SEF SS ay Pe ne EE EE at og 
