vi CONTENTS. 
230. oe iiber Mineral-Pscudomorphosen, F. E. Gernitz: New Minerals, 
C. U. — 231. 
Botany and — —Structure ae ———— of the Leaves of Dionzea musci- 
pula, Casimir De CANDOLLE: in oe er 232.—An intoxicating 
G 
iniana, A. GRAY, 
Note on Gigantic Cs Cephalopod, A E. VeRRILL. 236.—Comparative Zodlogy, by 
J. ORTON, 237.—Geographi cal Variation among North American Mammals, J. A. 
rae —Archivos ao awe Nacional do Rio de 008 Etudes sur les 
Echincid 3, 8. Loven: Bulletin of the v. S. National Museum: Natural His- 
tory of Korgoctisl Island, J. H. K1pDE 
Miscellaneous Scientific In Talelisooete: meena ‘of Physical Manipulation, by E. C. 
any ae 240.— Mechanical Theory of Heat, ete, by R. S. McCuLLocu: 
Theory of Ventilation, FRaNcoIs DE CHAUMONT, 241.—Ninth An me ual Report 
of the 7 Trustees of the Peabody Museum of American Archeology and Ethnology, 
243.— Obituary.—Professor McCheeney: Edward Newman: Ehrenb erg. 
NUMBER LXX. 
Arr. XXX.—On Cephalization; by J. D. Dana. Part 
Cephalization . funda mental principle in the Develop- 
ment of the System of Animal Life, .----------------- 245 
XXI.—Electro-magnetic Masins cers “2 the Cornell 
University workshop; by Wm. A. ANTHONY, - -------- 251 
IL—Sea-bottom Deposits observed duchig ‘the Cruise of 
the Challenger; by Joun Murray, ----.-.-- CS 
XXXIII.—Gmelinite from Nove Scotia ; ; “by A. B. Hows, -. 279 
XXXIV.—Occurrence of Duran ngite in the Bobo region 
of Durango, Mexico; by Henry G, Hanxs,.-.-.-.---. 274 
Ue ee a 
XXXVI “ Geological Chart of the United States east of the 
Rocky Mountains, and of Canada;” by F. H. Brapiey, 286 
XXXVIL— Observations upon the latest Planetoids; by 
W: Peres, 220 se ee ees 291 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Estimation of Nitrogen in Potable Waters, FRANK 
Absorption of Ni itrogen by Oraani ondelalie ces, BERTHELOT, or, 292. Soran of of the 
n Chlora 
Explosion of Fire Damp, MaLLaRD: Velocity of Electricity, W. SreMENS, ee 
Polarization a ScHILLER and CALLEY: Magnetic Induction, CHWOLSO! 
Constants . Natu 
neralogy. hee of the Vertebrate Fauna of the Eocene of New 
Mexico, Prof CoPE, 2 a ees, position of the Serpentine Limestone of 
Northern New York, J. Hawn, 298.—Geology of the Southern — phot’ 
