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4SS ^^jaEl^IC^N'J'^e^ICUItiai^I^l.olc^ [October, 
^V^XN\V^^\V^X^\\^^^V^XVXXSSV^SV^X^SV^X^V\SV^V^XN\VSSV\SV^X^X<\V^\SV\SV\^^ . 
4 O P T I C A L * I N S T R U M E N T S, • E T C. +- 
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Nos. 22 and 23. — Opera Classes.— 
Useful ill all larse assemblies, concerts, etc., ns ttiey af¬ 
ford a close view of speakers, singers, or the audience, 
also for making out the details of lofty buildings and 
paintings in galieries. Opera Glasses are in fact short 
range telescopes, to be used by both eyes at once. We 
offer two: 
No. 22, is a beautiful glass for a lady, made of 
either white or Oriental pearl— Presented, post-paid, 
for IT subscriptions at |!l.50each; OR, supplied, post¬ 
paid, for $16.00. 
No. 23, is covered in black morocco, with japanned 
tops, branches and slides. It has a seventeen-line ob¬ 
ject-lens, and liis into a good leather case. Of excellent 
manufacture, and desirable for either a gentleman or a 
lady. We Present this glass, post-paid, for T sub¬ 
scriptions at §1.50 each; OR, supply it, post-paid, for 
80.00. 
No. 24.—Field or Marine Class.— 
Price $16.00. — A large and very powerful pair of glasses, 
manufactured by one of the best makers, covered in 
morocco, and with black japanned sides. It is provided 
with movable sun-shades, one of which is shown ex¬ 
tended in the engraving, and fits into a neat case with 
shoulder-strap. Many persons irrefer this glass to a tele¬ 
scope, as it allows the use of both eyes, and it will be 
found convenient either in travelling or for over-seeing 
men at work in different parts of a field, etc. We will 
Present one of these handsome glasses, post-paid, to 
any one sending ns 17 subscriptions at $1.50 each ; OR, 
supply it for price, post-paid. 
No. 25.—Tourist’s Telescope. — Price 
$16.00—This is a very powerful instrument, and will be 
found a most delightful companion to any one making 
tours, whether on foot or by boat. It is provided with a 
snn-shade, and a convenient case with strong leather 
straps, so that it can be slung across the shoulders, and 
carried easily, thus being particularly adapted to moun¬ 
tain climbing. We will Present the Telescope for 16 
subscriptions at $1.50 each ; OR, supply it for the price. 
Sending it pre-paid in either case. 
No. 26. “ Achromatic” Telescope.— 
Price $.3.75.—This Telescope will give a distinct view of 
a house 8 or 10 miles distant. It measures 16!4 inches 
when extended, and has a brass body covered with mo¬ 
rocco. An ‘'Achromatic” Telescope is one so con¬ 
structed that the colors are not produced which some¬ 
times mar the view in an ordinary glass. When notin 
use, this Telescope collapses to a size convenient for 
carrying. We Present it, post-paid, for 5 subscrip¬ 
tions at $1.50 each ; OK, supidy it for price, posi-paid. 
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No. 27. 
No. 27. — Thermometer. — Price $1.25. — 
Every one should have at least twoThermometers,soas to 
be able to compare the temperature of the house with that 
outside, and now that these articles are sold so cheap, it 
would be very easy, and always beneficial to have one in 
each room as a guide in the heating, etc. The one we 
offer is strong and neat looking, and sufllciently accu¬ 
rate for ordinary household use. We Present it, 
post-paid, for 2 subscriptions at $1.50 ; OR, supply it for 
price, post-paid. 
No. 28 and 29.—Two Useful Classes. 
—The Reading Glass, No. 28, is very convenient, 
having a handle, and being a slight magnifier—the lens 
measures 31^ inches in 
diameter, and will he found 
of great assistance to per¬ 
sons having weak eyesight, 
or to any one looking at engravings, etc. It will be 
Presented for 2 subscriptions at $1.50 each ; OR, 
supplied for $1.50, post-paid. 
No. 29, is of higher magnifying power than the 
preceding, and is intended for carrying in the pocket, 
having a case of hard rubber attached. Convenient for 
examining insects, flowers, or any small objects, or can 
be used as a sun-glass. The engraving is less than half 
the size of glass, the lens measuring IX inches in diame¬ 
ter. Presented for 2 subscribers at $1.50 each; OR, 
supplied for $1.20, post-paid in either case. 
No.30.— Pocket Compass.— Price $ 2 . 00 .— 
This Compass is mounted in a strong, brass case, with a 
secure cover, provided with a “stop,” by which the 
needle can be lifted from the point when not in use. A 
Compass is always desirable, and particularly satisfactory 
to a person away from home, as one is often apt to “lose 
hi.s bearings ” when in a strange place. Presented, 
post-paid, for 3 subscriptions at $1..50 each ; OR, sup¬ 
plied, post-paid, for price. 
No. 31. —Craphoscope and Stereo¬ 
scope Combined.— Price $ 6 . 00 .—This glass is 
intended to be used in looking at pictures of all kinds, 
and is a good magnifier. The pleasure derived from the 
pictures is incalculably increased by use of the Qrapho- 
scope, which contains, besides, a pair of glasses for look¬ 
ing at stereoscopic views—diameter of larger glass, four 
inches. Presented for 8 subscriptions at $1.50 each; 
OR, supplied for price. Receiver to pay expressage. 
No. 32.—Simple Microscope.— Price so 
cents.—Another magnifying glass, which answers all the 
purposes of the i)receding, and has the advantage of 
being provided with legs, by which the properis 
determined. A person not accustomed to the use of a 
magnifying glass, will find this one especially servicea¬ 
ble in examining counterfeit bank-notes, clover, grass, 
and seeds, etc. Presented, post-paid, for 1 now 
subscriber at $1.50 ; OR, supi)lied for price, post-paid. 
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