MAGIC LANTERNS. 



219 



Slider 5. A diagram to prove the earth's rotundity, by a 

 ship sailing round the globe, and a line drawn from the eye 

 of an observer placed on an eminence. Price, $3. 75. 



Slider 6. This diagram illustrates the eccentric revolution 

 of a comet round the sun, and shows the appearance of its 

 tail at different points of its orbit. Price, $5.25. 



Slider 7. The diurnal motion of the earth, showing the 

 rising and setting of the sun, illustrating the cause of day 

 and night, by the earth's rotation upon its axis. 



Price, $4.00. 



Slider 8. This diagram illustrates the annual motion of 

 the earth round the sun, with the monthly lunations of the 

 moon. Price, 85.75. 



Slider 9. This diagram shows the various eclipses of the 

 sun with the transit of Venus ; the sun appears as seen 

 through a telescope. Price, $4.00. 



Or the whole set in a box with a lock, - $38.00. 



Set of constellations in six sliders, or twenty-four views ; 

 the first twelve being the constellations of the zodiac, the 

 others the most prominent in the heavens. 



Price, $12.0C, 



Figs. 741 and 742. 



Natural History Sliders. (Figs. 741 and 742.) The 

 most usual set consists of twelve sliders, having five views 

 on each slider, or sixty views in all ; of which twenty-five 

 are animals, fifteen birds, fifteen fishes, and five reptiles. 

 Price, of large size, in case, $20.00. 

 12 in set, " " $12.00. 

 8 in set, " " $ 5.00. 



A more extensive set of natural history in fifty-six sliders ; 

 twenty-four of which are mammalia, seven birds, four am- 



