. 
vi 
CONTENTS. 
NUMBER CLIV. 
Page 
Art. XXIX.—Some iy th a points in Geological Cli- 
to Professor Newcomb, Mr. Hill and 
24 
; by ROLL, 
XXX.—Minerals of the "Cryolite group recently found in 
Colorado; by W. Cross and W. F. Hittesrann,.. -- -- 
XXXII. —Origin and Hade of Normal Faults; by W. J. 
ONIN Biers oe ee ad beige din u so dos thal 
XXXII.—Sensitiveness of the Kye to Slight Differences of 
Slory Uy BO. Feinek Jey 055 oo es a eet 2 
XX XIIL—Injury sustained by the Eye of a Trilobite at the 
time of the Moulting of the Shell; by C. D. Watcort,. 302 
XXXIV. sg of the Rocks in Central Noe York; by 8. G. 
. 303 
We TERIA, et oa oe _ 
RAR. —Physiological Optics ; by T, W. Backuovss, . ib 8S 
SCIENTIFIC INTELLIGENCE, 
sae and Physics. Beal ceage ected of the Law of Definite Proportion 
J. P. Cooke, 310.—Spectrum of Beryllium, Harriey, 316.—Relation betaeee 
the Density and the Lele of ‘the en in different t Allotropic states, 
MULLER-ERzBaAcH, 317.—Behavior of Nascent Hydrogen in presence o 
of Light epee CINE, 320, ~ethod of 5 dieing the ems : New Seis 
Geology and Botany. eee Origin of the Hornblende ve the pps 
western States, — Irvine, 321 Peco of ‘the United Sta 
322.—C Siewert o American Botany, S. Watson, 323.  yoniieasol of 
Flowers, H. penn 3 
Miscellaneous Scientific Intelligence—American Association for the Advancement 
of Science at Minneapolis, 325.—British Association, 332 
Obituary.—J. REINHARD BLuM; W TLLIAM A. Norton, 332. 
