ve CONTENTS. 
NUMBER LVIIL. 
. Page 
Art. XX XIII.—Address of Dr. John L. LeConte, the retiring 
snares . = American Association for the Advance- 
enter Sdiones, oi. ic soe ek So adiccad 24] 
XXXIV. —On the Tasperakere ana" by riage 
and its Consequences; by Roperr Mauer, -._-------- 56 
XXXV.—Sir Charles Lye ell, Peg auenaiinds: be Guede Post 269 
XXXVI—On the Arithinetical Relations between the Atomic 
Weights: by MoD, CO. Hovesayn We ocr t 277 
XXXVII.-—On Southern New England oe Prag Melting 
of the great Glacier; by Ja tise sD. Dana: Nowiboos 280 
gee aeete tae s at the Canes Talands ; by ek. 
PoGersihey. 2224 p0n0ul . muni 1a. abiseeein! 382 
KXXIX.- Bp goer between the Ohio and West Virginia 
sides of the Alleghany Coal-field; by E. B. AnpREws,.- 283 
XL.—Instinct ? in Hermit Crabs; by "ALEXANDER AGASSIZ, _ 290 
SCIENTIFIC INTELLIGENCE. 
Chemistry a sics.—On the Constitution of Ammonium Compounds, MEYE 
and Lecco: eg Retene, EKSTRAND, 292.—On Paipkecione anew had harbon, 
ynthesis cris a dextro-rota gt aa acid, BREMER, 293.—On 
phoca 
ani 
GRETE, 294.—On the porno: of Ethyl Alcohol in Plants, Gutzeir: On Arbu- 
tin, HLASIWETZ and HABERMANN, 295.—A new Base obtained in the Aniline 
Ye ced Irradiation, Ce a a 296.—Conical se Senge fe Nopor, 297.— 
pacity of Gases, M. L. Bottzmann: The h aanies rendered 
rat send es g ee feeiote Hydrogen, Gro. MACLEAN, 298. 
and sa _ wae 2 Pitre oer and Metamorphism, a 
James D. Dan. tarthrus Bec. — 7 meg to have been veers in 3 
soe in tie ‘cemeoaouk Valley, W. Dopee: Forms and Origin of the 
Lead and Zinc te gen of palveunuine * acer tre ADOLF Scumrpt, 300.—Car- 
pboniferous < ifers, J. W. Dawson, 301.—Fossil Trees of Craigleith Quarry, 
tland: Volca ae ’ History of — E. J. ia ULL, 302.—Asphaltie Coal from 
the shale of the ‘Huron 2 Ohio, A. R. Lesps: Eruption = Tridimitic Ashes, 
Dr. ALTZER: Exploration of the Colorado River of the W i 
taries, by J. W. PowEL pio 303. —Report of the Geological Survey of Ohio, Vol. 
if 
Il, Part 4 Geology, 304.—Sixth Annual Report of the Geological Survey of Indi- 
ana made during Tag set 1874, 305.—Geological and Natural History Survey 
of Minnesota, 18 WINCHELL, 306.—Note on Lignite e —— Ja 
; in th 
Minnesota, N. H. WINCHELL, 307.—Note on the Age of the Cretaceous 
couver Island and Oregon, W. M. GABB: Sub-Wealden Exploration: sted ioe 
gebirge in — Dr. GEINITZ, 308 Fe yg ay Cabinet of “pe James 
Hall: On two new i CooKE and F. A. GoocH: 
Dana’s rome of Mineralogy: Hematococcus icone ‘de, 309. —Catal 
of Plants growing tee =" ation within thirty miles of Amherst College, 
N, 310.— pindacearum Genus monograp 
tum, LR LKOFER : Zar “Tse acon der Charen, A. pe B. : De- 
fa new (‘rustacean from haar Water-lime group at Buffalo. A. R. 'GROTE 
and W. H. Prrr, 311.—Bathybius, 
at 
Scientific In ear n Association, 313.—Foreign cemerae 
A ious tish Scientific Expedition, 315,—Images Me 
ightning. W. L. Brown, 317.—Anzual Report of rgentine Meteorologica 
— for 1874: aise American Cyclopedia, 319.—Boston Socie’ ’ Nat- 
ural History: Geographical Congress at — 320.— Obituary.—I. sn Lapham: 
~ Carl Johanw August Theodor Sohacter,. 4 
