2 Advertising Sheet of the 
Astronomy, Geotoey, and Merrorotocy.—Orreries, Telluri- 
ans, Globes 18, 12, 10, and 6 inches ceeters Clinometers for tak- 
ing the inclination 8d direction of strata, ecting Goniometer, 
Rain Gauges, Barometers and Thermometers. 
Execrao-Maenetisu.—A very great variety of Apparatus and 
Machines for Motion, Shocks, ed Sparks, for Scene this inter- 
esting branch of science. 
ALVANISM.—Batteries, improved segs ON of different sizes. 
J. M. W. would ae to his Catalogue for further erp 
copies of which will be sent per tall os on application. All lette 
oo 
‘|the Mass. Char. Mech. Association held in Boston. SitveR Mepat, 1837. Goip 
|Mepat, 1841. Sitver Mepat, 1839. Boston, Dec. 1, 1841. 
Dr. J. R. CHILTON, 
PRACTICAL CHEMIST, &c., 
No. 263 Broapway, New Yor, 
ment of Philosophical and.Chemical Apparatus, Chemical Prepara- 
tions, and every thing necessary for the study of Chemistry and 
lowing 
Pic’ s Frencn Atr-PUMPS, WITH GLASS BARRELS; other air- 
pumps with brass barrels, single and double, of various sizes, to-| 
gether with the various apparatus used with them. 
Large and small Puate Evecrrican Macuines, Cyninper 
ble of supporting from 20 to 3000 Ibs. 
Page’s Comp 
brilliant sparks and powerful shocks. The same instrument, with 
et a attached by which moh Beer of the shocks can be! 
modified at pleasure, which re it one of the most convenient 
the cure of disease, “ for physiological experiments. 
different kinds, and a great variety of Execrro-Macnetic InstRv- 
other branches “of Natural Philosophy—among which are the fol- 
Kreps constantly for sale at his establishment, a general assort- q 
Exectro-Macyets, mounted on frames, of various sizes, capa-} 7 
Maener and Evecrrorome, for producing} _ 
Bik Shobts for the application of ‘lectrictt as a remedial agent in| — 
working models of Exectrro-Macgnetic Macuines, of 
MENTS for the purpose of illustrating the theory of monet ee 
NETISM. 
‘ 
