AMERICAN AGRICULTURIST. 
453 
An Instructive Scientific Toy. 
Few farmers’ boys, or other boys, for that matter, 
understand how much of interest can be got out of 
a small Steel Magnet, here illustrated. It is 
of horse-shoe shape, of hard steel, with a soft iron Arma¬ 
ture, a, which it holds up when not in other use. The 
horse-shoe part, if bent out straight and hung in its mid¬ 
dle, will turn the Nend to the north. Rub the blade end 
of a pocket knife on the S end, hang the knife by a 
thread and its end will point North, and the handle will 
point South. Rub the knife blade on 
the South arm of the magnet,and it will 
then point North. Rub two knife 
blades on the same end of the magnet 
and they refuse to have anything to do 
with each other, unless forced to. 
Rub one blade on one arm of the 
magnet and the other blade on the 
other arm, and the two blades will 
cling together with loving affection.— 
Rub sewing needles or knitting needles 
on the magnet ends, and float them on 
water with a bit, of wood; the end rub¬ 
bed on the S end will turn towards the 
North Star. The knife or any hard 
steel rubbed on the magnet will pick No. 86. 
up needles, small nails, several small tacks, etc. There 
are many other curious experiments to be made with 
such a magnet, and every Boy and Girl ought to have 
one.—We can send a very good 6-inch one (bar 13 inches 
long, weight 11 ounces), anywhere in the U. S., post¬ 
paid, for 60 cents; OR we will Present one to any 
boy or girl sending us a new subscriber at 51.50 a year, 
87.— A stronger 8-inch magnet (bar 18)4 inches long, 
weightSl oz.)will besentfor §1.25, or for 2 subscriptions. 
Two Good Binoculars, or “ Opera Glasses.” 
—These are magnifying glasses for seeing objects at 
considerable distances, as well as in public gatherings— 
with both eyes ( bin-ocular). They are adjustable by 
screw and movable eye-pieces to different eyes and vary¬ 
ing distances. They are enclosed in a Leather Case, for 
carrying in one’s pocket. No. 88 is in either Jet or 
Gilt (gold-plated) Mountings, as preferred by recipient. 
Diameter of Object Lens, 15-lines (1)4 inch). This is of 
excellent make, and we will supply it, post-paid, for $6 ; 
OR Present it, post-paid, for 8 subscriptions at $1.50 
each.—No. 89 is very similar to the above, but larger, 
having 17-line (l 5 /i2 inch) Object Lens, and in the new 
Oxidized Mountings. This we supply, as above, for $7, 
or for 9 subscriptions at $1.50 each. 
Partial Description.— (A full De¬ 
scription, also Prof. Phinn's -‘ Book on 
the Microscope ” go with each Instru¬ 
ment)— : A. Heavy jet-black iron foot. 
—B, Two iron pillars, with trunions 
between, allowing the instrument to turn 
to any angle from perpendicular to hor¬ 
izontal.—D, Hard-rubber stage, with 
spring clamps, which are easily adjusted 
to thick or thin plates, 
or quickly removed—E, 
Revolving diaphragm, 
with different sized ap¬ 
ertures to graduate a- 
mount of light admit¬ 
ted.— F. F, CONCAVE 
mibkor, throwing light 
from beloiv through 
transparent objects, or 
turned above to throw 
light upon 
opaque ob¬ 
jects. — G, 
The body, 
nickel-plat¬ 
ed, which is 
moved upor 
down with 
Fig. 3—CAMERA LUCID A IN USE. 
great delicacy of adjustment of focus, by the rack and pinion, moved 
by the milled heads (one seen at ID—I, Two ob.tect 
glasses, used separately or together, according to power de¬ 
sired. These, the most important part of any Microscope, are 
of very superior quality.—D, is a nickel-plated 
draw-tube, 3K inches long, adding materially 
to the length of the body when higher magnify¬ 
ing power is desired.—It (shown in section at 
the left, in fig. 2), is a very complete eye-piece, 
with all the parts of the most costly Micro- 
scone, as field glass, Q; diaphragm of 
black metal, P; eye-glass, O.— All parts of 
the eye-piece are mounted in frames and re¬ 
movable screws.-Fig. 3. — The Camera 
Lucida is a new and most valuable appliance 
for throwing the image of any object, magnified 
to any desired size, upon paper in a way to be 
easily sketched with a pencil by any person, 
or by a child, if old enough to trace lines and 
marks with a pencil. 
invisible objects from 600 to 10,000 
times, and reveals a beautiful, wonderful 
world of objects all around us .far more nu¬ 
merous than all we can see with the natural 
e y es ._For example, the fine dust on a Cater¬ 
pillar or Moth is shown as great feathers, 
2 to 4 inches long, of exquisite design and 
construction ; and so of thousands of other 
things. It is very useful for Physicians, for 
investigating destructive and other farm 
insects, fungus, foul seeds, diseases, etc., and for all 
scientific investigations except a few of the more minute 
observations of specialists. It has the unqualified and 
high praise of Distinguished Scientists, who commend it 
to their students, and is yet so simple and easily managed 
with the plain instructions and Book accompanying it, 
that the common people can readily use it, and with 
A Wonderful Instrument. 
For Every Family aud Every Individual. — 
Should also be in Every Public and Private 
School in the whole Country.—It Reveals a 
Beautiful and Wonderful Unseen World all 
1 1882.] 
around ns.—To be obtained at One-fiftli of 
former prices.—The New American Agriculturist 
COMPOUND MICROSCOPE. -A Remark¬ 
able Instrument, that will alford a World 
of Interest aud Pleasure to Old and Young, 
besides being very Useful. 
In no other way that we can conceive of, can a small 
sum he so well invested to afford interest, pleasure, and 
instruction.—After years of effort and experiment, the 
Editors of the American 
Agriculturist succeeded in 
having Automatic Machin¬ 
ery take the place of slow 
and less accurate hand¬ 
work in producing a very 
effective, convenient, and 
■powerful Compound 
Microscope, and at a 
cost of only one-fifth to 
one-tenth the price charged 
for an equally effective and 
useful instrument not many 
years ago , including the 
Camera Lucida. 
(This Camera enables a 
Fig. 4. Microscope condensed 
in Walnut Case (8>4x4}£x33( 
in:), where it is hrmly held 
for carrying or keying. 
child even to sketch and preserve in large size the roost 
minute objects—those unseen or scarcely observable by 
unaided eyes.)—This Microscope Magnifies small and 
GREAT PLEASUISE and PROFIT, 
(N.B.—This Compound Microscope is no cheaply-made 
instrument, but is carefully and thoroughly constructed 
in all its parts, in the very best manner, by the best 
Optical Manufacturers iri the country. 
84 ,- Though fully equal to Microscopes formerly sold 
for $30 to $50, or more, without the Camera Lucida. this 
new instrument is supplied with the Camera Lucida at¬ 
tachment, all complete, to the public at $15, and to Sub¬ 
scribers to the American Agriculturist (for whom it was 
specially designed,) for $10— Further, it is Presented 
to any one forwarding 10 subscriptions at the regular 
price of $1.50 each.—The instrument is packed in its 
own convenient Walnut Case (fig. 4), and this is put in a 
wooden box, and sent safely anywhere by express at 
small cost for carriage—to be paid by the recipient. 
Glasses, Specimens, etc., go with each instrument. 
N. B .—Any one desiring the above Microscope for imme¬ 
diate use, or as a present, can forward $10 and receive it, 
and deduct the $10 if he should afterwards make up a Pre¬ 
mium Club for it, as above offered. 
No. 85.—Thermometer.— Handsome walnut 
frame; 8 inches long. Standard manufacture. For 2 
Two Simple, Clieap, Very Useful Glasses. 
Some kind of a simple Magnifying Glass, of large 
diameter and low power, is a great convenience to 
every person. Before adopting Spectacles permanently, 
or when they weary the eyes, or when they are too 
weak, a broad lens is very 
ff-‘ useful, one with a handle, 
(like fl0) t0 ]l0]d before 
(90-— Reading Glass.) the eyes in reading, in ex¬ 
amining any small work or objects, adjusting it to the 
specific want by moving it nearer to or farther from the 
eyes or object looked at. This form may be kept on the 
table, mantel, or bureau, or even carried.—A more con¬ 
venient form for carrying in the pocket, or reticule, is 
the Magnifying Glass shown in fig. 91. This shuts into a 
subscriptions at $1.50 each we will present this, post¬ 
paid, OR we will supply it, post-paid, for $1.25. 
(91.— Magnifying Glass.—Engravings /ese than half size.) 
neat hard rubber case of its own. and is of smaller dia¬ 
meter and higher magnifying power than No. 90. Either 
of them is strong enough to examine the ordinary parts 
of a flower, common insects, etc., and either one can be 
used as a sun glass, to produce fire by concentrating the 
heat of the sun’s rays. We can send anywhere, post-paid 
by mail. No. 90 for $1.50 (diameter of lens 3)4 inches), or 
No. 91 for $1.20 (diameter 1% inches); OR we will Pre¬ 
sent either one, post-paid, for 2 subscriptions at $1.50. 
1I-* 
Our Compound Microscope is unquestionably superior to all others manufactured here or in Europe. 
