Fig. 2. 



THE MAGIC LANTERN. 



1. Optical principle of the instrument. 2. Its most common form. 

 3. Magnifying power. 4. Precautions to be taken in the use of the 

 instrument. 5. Pictures on the sliders. 6. Opaque screen. 7. 

 Transparent screen. 8. Phantasmagoria method of producing it. 

 9. Exhibition with two lanterns. 10. Curious optical effects. 11. 

 Dissolving views. 12. Application of the lantern to the purposes 

 of instruction in history and chronology. 13. In geology. 14. In 

 astronomy. 15. Use of solar system. 16. Great utility of the lantern 

 for this purpose. 17. Views of the stars. 18. Nebulae and clusters. 

 19. Practical example of the utility of this instruction. 20. 

 Oxyhydrogen lantern. 21. Application of electric light to the lantern. 



1. THE magic lantern is an optical instrument adapted for 

 exhibiting pictures, painted on glass in transparent colours, on a 

 large scale by means of magnifying lenses. 



It has been shown (see " Optical Images") that when a picture, or 

 other object, is placed in front of a convex lens, at a distance from 

 it somewhat greater than its focal length, such picture or object 



LARDNER'S MUSEUM OP SCIENCE. o 193 



No. 104. 



