240 



THE AMERICAN GARDEN. 



[December, 



56 57 

 MICROSCOPES.— Our natural eyes only e 

 objects within certain limits in size, say, frc 

 the point of a needle upward. But smaller ev 

 than anything we can see with our eyes, there 

 a world of things of wondrous beauty aud form, 

 a thousand times more numerous than all ice 

 do see, a world that everybody should see and can 

 see. We have some glasses so arranged that we can 

 see, examine, and measure insects so small that a 

 common thimble will hold twice as mauy of them 

 as there are inhabitants in all the world ! And we 

 can see their heads, eyes, bodies, etc. The glasses 

 that enable us to see small things are called, 

 MICROSCOPES. A common sun-glass, or read- 

 ing-glass, gathers and brings extra rays of light 

 to the eye and is really a simple Microscope. 

 There are hundreds of forms and sizes. Then 

 there are sets of several glasses or lenses put 

 together so that they gather the rays, bring them 

 inside and form an image there ; the eye looks in 

 through a simple microscope, or eye-piece, which 

 magnifies the imaije, and is thus able to see the 

 thing looked at hundreds aud thousands and 

 millions of times larger than the original object, 

 according to the power of the instrument used. 

 Such arrangements are called COMPOUND 

 MICROSCOPES. These are of many forms and 

 prices, from $10.00 for a pretty good one, up to 

 thousands of dollars each. 



FINE OPEEA AND FIELD GLASSES, 



(Achromatic.) 



We offer our friends a choice from four very de- 

 sirable Opera Glasses, of tested quality. Clear 

 Achromatic lenses, and excellent instruments 

 every way. All fitted in superior Leather Cases. 



No. 48.— Lenses 19 lines (over 1% inches) diame- 

 ter and Achromatic ; mountings, caps, slides, etc., 

 beautiful black Japanned. When closed, is 3 inches 

 high. Barrels covered with fine morocco. Is 

 strong, neat and excellent, magnifying largely. 

 We supply it securely packed, carriage prepaid, 

 for $5.00. Or we present it, carriage prepaid, for 

 10 subscriptions to Ameu. Garden at $1.00 each. 



No. 49 — Extra tine, crescent frame; tops and 

 branches line Japan. Slides, Bottom and Branches 

 extra gilded. Barrels covered with tine morocco 

 (light brown or black as desired), with ornamental 

 gilded circles,— closes to 2% inches height. Lens 

 15 lines diameter, of first quality, Achromatic. We 

 supply this safely packed, carriage prepaid, for 

 $3.oo. We will present one for 19 subscriptions to 

 The Amer. Garden at $1.00. each. 



No. 50.— Splendid Pearl Body and Eye-Pieces. 

 Slides and all mountings extra gilded. All very 

 beautiful. Lens 15 lines, fine, powerful, Achro- 

 matic. We supply this for the low price of $10.00, 

 rarriage prepaid. We will present one, carriage 

 prepaid, for 25 subscriptions to The Amer. Gar- 

 den at $1.00 each. 



No. 51.— Field and Marine Opera Glass.— Of 

 strong power, extends to 9% inches, closes to 6 

 inches. Lens 21 lines diameter, achromatic, strong 

 power. Slides, Caps, etc., fine Japan. Sides and 

 shades covered with fine morocco. Case of strong, 

 firm Leather, with Shoulder Strap. Suitable for 

 land or sea, or large rooms. We will supply this 

 superb instrument for $14.70. We will present it 

 for 33 subscriptions, carriage prepaid. 



No. 52 TELESCOPE; Achromatic; superior 1 



quality ; fine Morocco-covered body ; the 3 slides 

 and object-glass cap all of polished brass ; sliding 

 eye-piece cover; extends to 18 inches long, and 

 closes for the pocket to 7 inches long and iy s 

 inches in diameter; magnifies fifteen times; ob- 

 ject-glass, 14 lines; weighs 13 ounces. In neat, 

 strong Case. We supply it, post-paid, for $4.00; 

 or Present it, post-paid, for 9 subscriptions to 

 Amer. Garden at $1.00 each. [See engraving.] 



No. 53.— TELESCOPE, every way like the 

 above (No. 52), except larger. Length, 8% inches 

 closed; 24 inches opened; 16 lines object-glass; 

 magnifies twenty times. Price, $5.37, delivered free ; 

 or Presented, delivered, for 12 subscriptions. 



No. 54 TELESCOPE, every way like the 



above (No. 52), except in size. Length, 6 inches 

 closed ; 24 inches opened ; lfi lines object-glass ; 

 magnifies thirteen times. Price, post-paid, $3.10. 

 Presented for 7 subscriptions. 



No. 55 Superior Reading Glass (also for 



Magnifying, Sun-Glass, etc.). 3 inches diameter. 

 In fine, light, strong, hard-rubber frame. We sup- 

 ply this, carriage prepaid, for $1.50. We will pre- 

 sent it, carriage paid, for 4 subscriptions to Amer. 

 Garden at $1.00 each. (2 for 7 subscriptions.) 



No. 50 Pocket Microscope (simple). Three 



lenses,—^ , %, and % inches, in hard-rubber setting, 

 and all closing into a strong rubber covering. 

 Lens used singly or in pairs, or all together, 

 according to power desired. A very serviceable 

 pocket instrument. We supply it, post-paid, for 

 $1.05 ; or present it for 3 subscribers to Amer. 

 Garden at $1.00 each. (2 for 5 subscriptions.) 



No. 57 Vest Pocket Magnifier, or MICRO- 

 SCOPE. A very neat, convenient magnifying glass 

 of considerable power, sometimes called "Linen 

 Prover." It folds into a small, thin space for any 

 pocket; is set at a right focal distance in a mo- 

 ment, to look at any small object, and has exact 

 openings y x x j£ inch, to count threads to inch in 

 linen, cotton, etc. Very handy for Ladies in buy- 

 ing goods. We will send it, post-paid, for 40 cents. 

 Presented to any one, post-paid, for ONE new 

 subscriber to Amer. Garden. 



THE WONDERFUL UNSEEN WORLD 

 Brought to Your Eyes. 



A most Remarkable Instrument , 

 th:it every reader of the American 

 {jiarden can now easily possess. 



Full ol* interest and of great 

 Practical Utility. 



The publishers of The American Garden are 

 happy to announce that they have secured a most 

 interesting and valuable Compound Microscope, 

 that camiot fail to give great pleasure to every 

 one that obtains it, and that they cannot only 

 supply it at a very law price (not a quarter of the 

 old price for so excellent an instrument), but mul- 

 titudes can obtain one WITHOUT COST. 



The engraving shows the instrument (in part) 

 which is three times as large as this picture. It 

 magnifies objects from 2500 to 10,000 TIMES 

 their natural size, and even more if desired (50 to 

 120 diameters). See description of " microscopes " 

 in another column. 



This instriuneut is of the most perfect make, and 

 it has all the chief parts of compound micro- 

 scopes, costing from $50 to $500, including solid 

 Stand, Joint for inclinations, Stage, Clamps, 

 swinging concave Mirror (for transparent and 

 opaque objects), Draw tubes for greatly increas- 

 ing magnifying power, two very fine Object Lenses, 

 a very fine Eye-piece, very delicate Pack and Pin- 

 ion for easily adjusting the focus, etc. The Body 

 and Draw Tubes are tine nickel-plated. A very 

 important adjunct is the 



CAMERA LUCIDA, 



which throws upon paper a highly magnified 

 image of very small and even invisible objects, so 

 that a child can make accurate drawings of them. 



The whole instrument and parts are fitted into 

 a very neat walnut Case, with handles — both for 

 keeping and for carrying anywhere. Each instru- 

 ment has several Accessories, such as glass cell 

 for fluids, plain slides, glass covers for objects, 

 and a mounted object. 



It will afford wonderful interest to ecery pos- 

 scssor, and be useful in a thousand ways— in 

 detecting the minutest adulterations in food, the 

 infinitesimal insects that destroy plants, etc., etc. 



We will supply this Superb Instrument for only 

 $10. Every Instrument is guaranteed by the best, 

 makers in America (the Bausch d- Lomb Optical 

 Company). BETTER STILL. We will PRE- 

 SENT it complete to any one sending us only 13 

 subscriptions to The Amer. Garden at $1 each. (To 

 purchasers, $1 discount from the price for each 3 

 subscriptions to Amer. Garden sent us.) 



