vill CONTENTS. 
NUMBER CXXXIL : 
puee 
Art. LIV.—On a possible cause of the Variations observed 
in the amount of Oxygen in the Air; by E. W. Morey 4 
LV.—On Jolly’s Hypothesis as to the Cause of the Varia- ; 
tions in = Ses eda of Oxygen in the Atmosphere; 
E. 
a 
funk 
~T 
ee es 
LVII.—A Contsibution to Croll’s Theory of Secular Climatal 
Change Ot a OR ee 437 
LVIII. arBhe St Stereoscope, and Vision by Optic Divergence ; 
a EB a ee alee ie eh ee 443 
LIX.—On the Selakinas: ‘of the so-called “Kames” of the 
Connecticut River Valley to the Terrace-formation ; by 
J. D. Dana 45 
LX.—Japanese Seismology; by C. G. Rockwoop---------- 468 
LXIL—An Apparatus for ~ Distillation of a etevsny in 
_Vacuo; ee igs a ge 479 
SCIENTIFIC INTELLIGENCE. 
Physics and Astronomy.—Dynamo Electric Machines, W. Tuo : Rotation. of 
plane of Polarization of Light by the Karth’s Magnetism, a Bac cqu UBEREL : 
oe of the Ohm, RAYLEIGH and ScuusrEr, 484.—Ephemeris of the Satellites 
re Hi. S: PRITCHETT, 485, 
Geology and Natural History. — Geologiea Survey of Pennsylvania, 485.—First 
olay Report of the U. 8. Geological Survey, C. Kine: The Kames of Maine, 
G. H.8 
, 487.—Geology of Staten Island, N. L. Brirron: Apu 8, 
d D. ZaccAGNA, 488,—Jelly-like carbonaceous mineral resembling dop- 
plerite, from Scranton, — , T. Coop: meralds from Ale Count 
North Carolina, W. KE. H1p 89. ef notices of some recently described 
crop 490.—Artificial formetinn of the Potash-feldspar, Orthoclase, C. FRIE- 
pp aneemae English Plant-names from the Tenth to the Fifteenth 
Contu ury, J. 491.—Familien Podostemacez, H. sg hes 
mows la Bo lciane et la m morphologie des ferments alcooliques, HE. C. HANSEN, 
qu 
—QOn an Organism which penetrates and excavates Siliceous Sp onge- 
peiciles P. M. Duncan, 493.—Bulletin of the Museum of Comparative sh! 
at Harvard os aee The Palzocrinoidea, WACHSMUTH and SPRINGER: Cosmos 
les Mondes 
; _ Index to NG xxii, 495. 
ERRATA. 
P. 186, 3d line from top, for “ type are” read “ type, are.” 
t 181, 5th line from bottom, for ‘ effected” read “affected.” 
12th line from bottom, after — Mayer” the sentence should be 
contnuovs: thus “Adolph Mayer, I find, e 
P, 191 i, 7th line from top, for “clay, permeating” read “clay, but permeating.” 
Pp. 191, for ‘differing so in” read “ differi 
: 199 2, 11th line from top, for “ proportionstely” read. FS Apa bine nas 
P. 240, 4th line from bottom, for Capt. W. H. Dow, read Prof. W. H. D 
P. 286, 19th line from bottom, ye “ Prototheria ”’ read “ Pantotheria.” 
Sane Se ie ie ciics uneSaa > a cae a ee a 
