43 



22 Solar System of Tycho Brahe. 



23 Solar System of Newton. 

 24, 25 The Sun's Magnitude. 

 26 Eclipse of the Moon. 



27, 28 Eclipse of the Sun. 



29 The Moon's Orbit. 



30 Different Eclipses of the Moon. 



31 The Seasons. 



32 The Zodiac. 



33 Spring Tide at New Moon. 



34 Spring Tide at Full Moon. 



35 Neap Tide. 



36, 37 Constellation Ursa Major. 

 38, 39 Constellation Orion. 



40 The Milky Way. 



41 Nebulae. 



XOVABLE DIAGRAMS. 

 The motion produced by rack-work. 

 TEN SLIDES, PER SET, $40.00. 

 Packed in a box, with lock and key. 



1 The Solar System, showing the 



Revolution of all the Planets, 

 with their Satellites, round the 

 Sun. 



2 The Earth's Annual Motion 



round the Sun, showing the 

 Parallelism of its axis, thus 

 producing the Seasons. 



3 The Cause of Spring and Neap 



Tides, and the Moon's Phases, 

 during its revolution. 



4 The Apparent Direct and Retro- 



grade Motion of Venus or Mer- 

 cury, and also its Stationary 

 appearance. 



5 The Earth's Rotundity, proved 



by a Ship sailing round the 

 Globe, and a line drawn from 

 the eye of an observer placed 

 on an eminence. 



6 The Eccentric Revolution of a 



Comet round the Sun, and the 

 appearance of its Tail at dif- 

 ferent points of its Orbit. 



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 H* 

 Axis. 



8 The Annual Motion of tho Earth 



round the Sun, with tho 

 Monthly Lunations of the 

 Moon. 



9 The Various Eclipses of the Sun 



with the Transit of Venus ; the 

 Sun appears as seen through a 

 Telescope. 



10 The various Eclipses of the 

 Moon ; the Moon appears as 

 seen through a Telescope. 



Illustrating the Moon. Its Topography, 

 Scenery, &c., with a Familiar Descriptive 

 Lecture. 



TEN SLIDES, PER SET, $15 00. 



1 Map of the Moon. (Beer and 



Madler.) 



2 Diagram illustrating Refraction. 



3 The Earth, as seen from the 



Moon. 



4 Telescopic View of the Full Moon 



5 Telescopic View of the Moon, 



first quarter. 



6 Telescopic View of the Moon, 



last quarter. 



7 Telescopic View of the Moon, 



past last octant. 



8 Environs of Tycho (from a Pho- 



tograph by W. de la Rue). 



9 Region S. E. of Tycho. 



10 View of Copernicus (Naysmith). 



TWENTY SLIDES, PER SET, $30.00. 



1 Solar System. 



2 Phases and Apparent Dimensions 



of Venus at its extreme and 

 mean distance from the Earth. 



3 Inclination of the Axis of the 



Planets Venus, Earth, Mars, 

 Jupiter, and {Saturn. 



4 Diagram illustrating Refraction. 



5 Parallels, Meridians, and Zones. 



6 True and mean Place of a Planet 



in its Orbit. 



7 Signs of the Zodiac. 



8 Telescopic View of the Full Moon 



9 Telescopic View of the Moon past 



the last Quarter. 



10 Cause of the Moon's Phases. 



11 Mountains on the Moon. 



12 Inclination of the Moon's Orbit 



