SCHOOL APPARATUS. 



281 



SET OF APPARATUS FOR OPTICS. PRICE $163. 



-A i 



:if" 



1. Sot of Six Lenses $1 50 



2. Prism 075 



3. Color-Blender 1 00 



4. Pair of 5-inch Mirrors, Concave 



and Convex 225 



5. Multiplying-Glass 38 



6. Camera Obscura 4 00 



7. Cosmorama and 12 Views 4 25 



8. Model of Eye ) 



9. Muscles of Eye 1 iq nn 



10. L.mtf & Short .Sight Explain, f Jl 



1 1. Image un Retina J 



12. Simple Microscope 1 00 



13. Compound Microscope $3 50 



14. Solar " 2800 



15. Astronomical Telescope, with 



3-inch Achromatic Object- 

 Glass. and about 5 feet long 

 on Stand 48 00 



16. Magic Lantern $3 to ] 5 00 



17. One Dozt-n Sliders $2 to 1500 



Set Asrronom. Sliders $750 to 20 00 



18 Poli.riscop- 450 



Crystals fur Polat i.-^cope ] 00 



$16331 



A good Compound Microscope may be had for $3 50; larger, 

 $5 50, $9 50, $10, and $20. Superior Magic Lanterns, $15 ; Sliders, 

 4 inches wide, on Astronomy, $20 the set; Natural History, $20; 

 Botany, $20 ; Scripture History, $27 50 ; Humorous and Comic 

 Sliders, $1 25 each. Also, Views and other subjects in great variety. 

 A pair of Lanterns, with Dissolving Apparatus, $50. Astronomical 

 Telescopes, with Mahogany Tube, on Stands, according to size, $30 

 to $48. Others of various kinds and styles, with Brass Tubes, vary- 

 ing from $25 to $400. The Eye Models in four parts : A Dissected 

 Eye, four inches diameter, showing the cornea, iris, ciliary process, 

 choroid tunic, crystalline lens, vitreous humor, retina, black pigment, 

 optic nerve, &c., and the eye in its socket with the muscles ; the Eye, 

 with the rays of light passing from an object and forming the image 

 on the retina ; the object and image moveable, showing the cause of 

 long sight, short sight, and perfect sight ; and a 4-inch ball, with 

 convex lens on one end, and a ground glass fixed to a sliding brass 

 tube on the other end, and on which may be seen the inverted image, 

 representing the eye as a camera obscura, and by the aid of the set of 

 lenses, the use of spectacles to the eye explained. 



