CONTENTS. ¥ 
Blue Pigment of the Egyptian : Magnetic Observatory in China, 159.—Fest- 
schrift zur Feier des hhondertjbrigen Bostelions der Gesellschaft N aturforachen- 
der Freunde zu Berlin: Am n Association for the.Advancement of Scien 
French Association for the Advancement of Science: Academy of Scie énces, 
Paris: University of Oxford: Half Hour Recreations in Popular eee On 
the so-called Land-Plants of the Lense! Silurian, 160. 
NUMBER XLV. 
Arr. XV.—On the possible Variability of the Earth’s Axial 
oo as investigated by Mr. Glasenapp; by Simon 
Page 
ag oe ae in Acoustics; by AtFrep M. Mayr 170 
XVII.—Description of a new apparatus for Gas Aoalyee ; 
SEMA 3 =o pan eng plu ew oe wee wae 182 
XVII —Ressonine on the Hexatomic compounds of Cobalt ; 
by Byer oLcorr Grpps. (Continued), .. -..-.... 2-22.22. 189 
_ XTX.—On the Mechanism of Stromboli; by Rosert Matter, 200 
: XX. —_Brief Contributions from the Physical Laboratory of 
: Harvard College. No. XI.—Increase of Magnetism in a 
| ba af soft iron upon the Seti of the magnetizing cur- 
2 
No. XIL—On the effect “of | bongitidinal vibrations upon 
Electro-magnets ; by E. L. Carney, - - 2038 
No. XIII [Experiments on the Dissipation of Electri- 
. city by Finmes: by J: W. Pawan.) 2.2.2 207 
| o. XIV.—Polarization of the Plates of Condensers ; 
208 
by rs s. THAYER, . : 
CIENTIFIC INTELLIGENCE. 
Ss 
Physics. ch Caplry of Insulators, BourzMANN, w of saline solutions 
sig Capillary Tubes, HiBener, 211. co oeaiee a bide by Fusion, MaL- 
: ‘atural History th +h os > 
Geolozical time in the new edition of Daria’s Manual ‘a Genter fase the ATO 
213 inged Fruits of rs reesei Spee Cardiocarpus: Coal o 
Carboniferous era not made of bark: The ash of the better Coals of the eae 
can Nosy arin it age often = tivated Gon the fei sir 53% plants 
of the Carboniferous age in Protogine of the e@ proposed genus 
Anomalodonta of Miller edontical with the a  Maptor ae: Meek, 218.—On 
the Quaternary containing the New Brunswick fossil Cetacean; on Niagara 
agara fossils in tra oy D. HONEYMAN, 219.—Dese: 
tions of new species of Goniatide, with a list of gteged — ibed species, 
9 
3 
3 
& 
Bate 
g 
45 
=. 
i% 
ba 
3 
Miscellaneous Scientific Intelligence.—Change of _ zs eee Great Salt Lake, 226. 
On the Ph Ocean Currents, b AMES CROLL, ip sag on 
| 
® 
a 
a 2S: . 
$ 
c 
2 & 
28 
: ing of the American Association at Hartford, 235. = Sibemicns U entennial. 239.— 
Elements of Nouhoes &e., by J. ARTHUR Purtiips: Volume of Collected Re- 
Searches of J. Lawrence Smith, 240. 
