Philosophical Apparatus, S;c., sold Ip Hoeke, Thoekth waite, & Wood, 123, Newgate Street,
9
Messrs. Horne, Thornthwaite, and Wood, beg to call particular attention to tlieir Achro-matic Microscopes, which are constructed on the best principles, and can confidentlybe recommended for all purposes of microscopic research, which now forms such animportant feature in the study of animal and vegetable physiology, &c.
a Magic and Phantasmagoria Lanterns, Slides, &c., from I63. to £5 5s., and upwards ; if,2 for exhibiting Astronomical Diagrams, Views, &c., from £110s. to £21 and upwards.§ Oxy-Hydrogen Microscopes, Chromatropes, &c.
DISSOLVING VIEWS
{As shown at the Royal Polytechnic Institution.)
Complete Apparatus, with Lenses 3 inches diameter, illuminated with ArgandOil Lamps, capable of showing a disk 9 feet in diameter ....
Views for ditto ; . . . - . . . from 7s. Od. to
Dissolving View Apparatus, illuminated with the Oxy-Hydrogen or LimeLight, capable of showing pictures 20 feet diameter, consisting of a pairof mahogany lanterns, with brass fronts, and dissolving apparatus, 2 pairof 4 inch lenses or condensors, 2 oxy-hydrogen jets and lime burners,flexible tube connections, 2 large India rubber bags and pressure boards,lead bottle, tube, and purifier, tor making hydrogen gas, iron retort, &c.,for oxygen gas, folding mahogany tripod stand, Me., complete . . .
Ditto, Ditto, with C inch condensers
Ditto, Ditto, 9 inch ditto .
Views for Ditto, from 25s. to 80s. each, and upwards.
Oxy- Hydrogen Microscope, with objects fitted to the above . . . from
Ditto, Ditto, complete with the gas apparatus, &c. .
£ s. d.
10 10 00 10 0
42 0 0GO 0 085 0 0
15 15 035 0 0
ACHROMATIC TELESCOPES.
18-inches long, with rack and pinion, on stand.8 8 0
Ditto, ditto, in German silver. 14140
30-inch ditto.12 12 0
Ditto, with vertical rack.14 14 0
Ditto, with vertical and horizontal rack.21 0 0
Ditto, with finder and micrometer.23 10 0
42-inch, with rack and pinion. 30 0 0
Ditto, with vertical rack. 32 0 0
42-incli, with vertical and horizontal rack-work movement, finder, and
micrometer.30 0 0
Ditto, with extra large object glass. 40 0 0
Ditto, with equatorial stands . . . . . . . extra 30 0 0
Telescopes, from 5 to 7 feet, with all the recent improvements, from £100 to 300 0 0The whole of the above Astronomical Telescopes are furnished with two-day powers, andtwo or more astronomical powers, and are packed in cases.
REFLECTING TELESCOPES, St c.
One-foot Gregorian Reflecting Telescope, on stand, packed in mahogany case,
speculum 9£ inches diameter.
One-foot and a-half ditto, speculum 3 inches diameter.
Two-feet ditto, speculum 4 inches diameter.
Ditto ditto, with rack-work motion.
Three-feet ditto, with speculum 5 inches diameter, and rack-work motionDitto ditto, with speculum 6 inches diameter, on tripod stand, and rack-work
motion.
Four-feet ditto ditto, with speculum 7 inches diameter.
Seven-feet Newtonian Telescope, with speculum G inches diameter
Ditto ditto, with speculum 7 inches diameter ..
Nine-feet ditto, with speculum 9 inches diameter .......
Transit Instruments.from £20 to
Micrometers, &c., Me.
G
11
1G
25
42
63
105
105
126
210
180
6
11
10
0
0
0
0
0
0
0
0
QUADRANTS,
Ebony Quadrants . . . . ,
Ditto ditto with Tangent ferewDitto ditto with Telescopes , ,
0
0
0
0
0
0
0
0
0
0
0
0
0
0