CONTENTS OF VOLUME IV. 
8 
NUMBER XIX. 
ART. Be: ie of Recent Earthquakes; by C. G. Rocx- 
Deis oe) 20k gg wen eee gk re es Sn oe a Sos ae 1 
IL. olan from the Physical Laboratory of Harvard 
ata be No. ty Pier be Ceggune Condition of Gas 
Flames; by Jon OWERINOS, sc poe oonch Sn FE ae 4 
Ill. the Maienis r sie Coasiiiegt Physics by W.A. Norton, 8 
IV.—On the Datolite from Bergen Hill, New Jersey ; by Ep- 
WARDS cI AWae 2 WG Piste Ly uc po Je. eden a sen 16 
V.—On certain Lower sepia rocks in St. Lawrence county, 
; eA OME Bui Shares phd bee test 4d te Ss 3 
VL—On a simple Apearatts for me hyp ee hac ne 
with Electricity of high tension; by A. W. W 738 
VIl.—On the Action - Ozone upon ‘Vuleanized Masse ey 
Nya Wa Wh RIGHE, 2s ccna 3. on ete eo a heed 29 
VU. On the Gesane Coral Island Subsidence; by Jamzs 
pds Se De oe La ew Sines ate oe 2 epee eee ee ee 31 
IX.—On a precise Method of tracing the Progress and of de- 
termining the ae pei of a Wave of Conducted Heat ; 
by Anwenp Mi Mayee, oo oo% ob ce vitiengs- arden edit 37 
X.—Remarks on the ee. Criticisms of Prof. Dana; by T. 
EMRE SAUNT yd cca ebok Siviias st 055.0. eum es 41 
XL—On ee: Meteor of April 30th-May Ist; by Danten 
eR rl od eds sd ie 52 
XI. —Out the ‘Tertiary Basin of the Marafion; by Cu. Frep. 
Beets Cee Sask baw ae es 53 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—On the wg td emitted by the vapor 3 iodine, Satet: On 
the absorption spectra of the vapors of selenium and of.certain other bodies, 
GERNEZ, g anies = Sete te n spectra of the vapors se pacar selenious 
acid and h : On soap of silver, Gor! th 
of fixing the Comets of Acids an d Alcohols ‘by the oat 
of their 
age Poporr, 61.—On Phenol-eolors and their Relation to Natural own 
ng Ma YER, 64 
AEYER, 62.— 
Citeny and Natural History.—On t os Kozoon, Dawson, 65. ae of a 
hs of 
a Large 
Bone Cave in re ee 69 —Pseudomorp Serpentin e with the form of 
Staurolite, Ranp, is —Hisingerite, from the Gap Mine, a yowstoved County, 
Pa., Ranp: Descriptions of new species of fossils from the vicinity of Louis- 
ville, Ky.. and i Falls of the Ohio, JamEs Haun and R. P. W 
Mine ical i soo of vom 
bi asiinocomt 
gs sactions 
the Nova Scotian Insti te of Natural Science of Halifax: sei Micheli, On 
mt Re 
prem ike Double Star Castor, 77. eee of Ibbenbiihren, Westphalia, 
: Meteorites of India, TscHERMAK, 78 
