* ~ |Cistern with Gas-holder, improved from the best English, Lamp 
_ joints without Inting, Pyrometers, Porcelain Mortars, and Evapora- 
land plain Retorts, Glass Tubes, &c. &e 
Apriz, 1844. 
"OF THE 
AMERICAN JOURNAL OF SCIENCE. 
PHILOSOPHICAL APPARATUS. 
JOSEPH M..WIGHTMAN, 
No. 33, Cornutut, Boston, 
|Manufacturer of Philosophical, Mechanical, and Chemical Appa- 
ratus. 
Among which, are Apparatus for illustrating Inertia, Attraction, 
and other Laws of Matter. 
Morion.—Laws of Falling Bodies, Compound Motion Sets, for 
Centre of Gravity, Models of Cycloidal Pendulums, Brachysto- 
chrone, or line of swiftest descent, Law of Central Forces, show- 
ing that bodies in rapid rotation always select the shorter axis, Ivory 
and Boxwood Balls for collision. 
Mecuanicats.—Complete sets of various sizes, from $25 to 
100: 
Hyprostatic and Hyprautic Apparatus, in great variety. 
Pyeumatic.—Lever Air-Pumps, on Leslie’s construction impro- 
ved. Barrel 4 inches and plate 13 inches diameter; patent Single 
Barrel Lever Air-Pumps, on table stand, and also of portable size 
for Academies; Common Air-Pumps, and Condensing Syringes ; 
with a breat variety of Apparatus adapted to the different sizes. 
Execrrican Pirate Macuines.—Improved construction of all 
sizes. Cylinder do. 6 to 10 inches diameter, Batteries, Jointed and 
Universal Dischargers, Balance, Gold Leaf, and other Electrome- 
ters, Thunder Houses, Cannons, &c. &c. &c. 
Curemicat.—Compound Blowpipes, Parabolic Reflectors silver 
plated, in cases with Apparatus, Gas-holders,- Cast Iron Mercury 
_|Stands with improved Shifting Rings, Spirit Lamps with Glass Caps, 
|Furnaces of various sizes, Oxygen Retorts of Iron with tubes, tight 
ng Dishes, Nooth’s Apparatus, Bell Glasses, Alembics, tubulated 
pricat.—Lenses, Mirrors, Prisms, Models of the human Eye, 
Single and Compound Microscopes, Telescopic Kaleidoscope, Phan- 
by J. M. W. and warranted superior 
jtasmagoria Lanterns, imported 
with great variety of sliders on Astronomy, Natural 
a ee ae other, ij 
b % | istory, Ancient and Modern Costume, Views, &c. &c. 
