CONTENTS OF VOLUME XLVIUI 
Se 
NUMBER CXLII. 
Art. L—Charles Grafton Page, ---.---- 
Il.—On Hortonolite, a new member of the Chrysolite group ; 
by Grorcs J. Brusn, with measurements and observa- 
tions on the crystalline form of the mineral, by Joun M. 
BRE o 5i os ce ewe DERE eee wadeu gees 
IiI.—Notes on some points in the Structure and Habits of 
the Paleozoic Crinoidea; by F. B. Meek and A. H. 
W OBTHRER, ok. acs 
IV.—On the effect of Atmospheric Air when mixed with 
Gas in reducing its illuminating power; by B. Srtman, 
and Henry Wurtz, 
V.—Description of a a new to se of Protichnites from the 
Potsdam istone of New York; by O. C. Marsu, 
(With a Plate , - 
VI.—Notices of papers in a Physiological Chemistry—No. IT; 
by Grorcr F. Barker 
_ VI.—<Aurora at Toronto, Gaus: ; by G. T. Kinesron, ---- 
VIL—A Qualitative Separation of Cobalt and Nickel; by 
Frank WiaeLeswortH CLARKE, 
VIII.—Notes on the structure of the Crinoidea, Cystidea and 
Blastoidea ; by E. Brings, 
Ix .~-Hpeotfoasopic examination of the Diatomacer; by H. 
L, Suir, 
X.—Note on Wollongongite, a remarkable hydro-carbon 
found in the Wollongong District of the Illawarra Coal 
Field, N. 8. Wales; by B. Srziiman, 
XI.—The Rules of Zoological Nomenclature; with notes by 
A. E. VERR 
XII.—Contributions from the Sheffield Laboratory of Yale Se 
College—No. XIX. On the estimation of Carbonic 
Acid; by 8. W. Jounson, 
