CONTENTS OF VOLUME IX. 
NUMBER XLIX. 
Page 
Arr. L—Results derived from an examination of the United 
States Weather a a for all and 1873; by E. Loomis. 
With Flste I... Second Paper... 1022.25.42 325.52 1 
IL—On some points in the Gedlogy of the Blue Ridge in Vir- 
gmis; by WieoM, Ponraite. 8. cca ce oe 4 
Ii. Projection of the Frechhoee Lines of Diffraction and 
Prismatic Spectra on a Screen; by Jo - 22 
TV.—Abstract of results a new discussion of the secular 
change of the Magnetic Declination in the United States, 
and some adjacent —— in North and Central America ; 
uy Coames A Sénory; oi io es. A 25 
V.—On the ogg of Seated ; by Henry M. Parkuurst, - 37 
much extended Nebulz of Sir John geen 
Senuied ‘atalogue; by Be Metal A BOR oe eae 42 
VII.—On Venus as a Luminous Ring; by C. 8. Lyman, ---. 47 
VA, —Discovery of a New Planet; by James C. shy soto a. 48 
IX.—Ancient pel Ieee of the Rocky Mountain Region 
by O. ARS 
SCIENTIFIC Sep bite iot 
Physics.—Theory of Electricity, E. EDL 53.—Electrostatic Induetion, aa Nery- 
EUF: Effect of Flame on an Electrio. Spark, 8. J. Mrxter: Law uning 
Forks, M. Mercaprer, 54—Polarization of Light, WM. SrormswonDe, a 
eology and Natural History. ee = North Carolina, 55.—Porphyry 0 
ni 
ries, 59.—On the more rapid deposi ek Sodanent t in salt than in fresh eater: 
sian boring at the St. Louis recone sylum, 61.—Return of Prof. Marsh’s 
edition : Sores of the 40th Parallel, 62.—Geological Sketch of the State of 
Missouri, by G.C. SwatLow: Das Elbtha igebinge in Sachsen of Dr. GEInrTz: Pre- 
liminary An LEN of Chondrodite crystals from the Tilly Foster Iron mine, Brewster, 
N. Y., by E. S. Dana. 63.—Livingstonite: On eo a new mineral, by 
Levy, 
Nature of the Sea-bottom, 0. Wyvitte Tomson, 72.—Index to volumes I to 
re us ‘art eee on the Genus Unio, by Isaac Lea: Reliquiz Aquitanice, 
y <s 
States, by Francis. A. WALKER, 74.—Cave Hunting; Researches on the evidence 
of Caves sha tone 2 the early fahabitanta of Europe, by W. Boyp Dawkins, 
— Obitua a PR s Walker: Edwin Lankester: Dr. Thomas Anderson: Sir 
William Jardin 
