"THE ORRERY." 



■ A pl)ilosoplier gives that lecture on the Orrery, in which a lamp is put 



in the place of the sun." 



"THE AIR-PUMP." 

 " An experiment on a Bird in the Air-pump.' 



'THE ALCHV^nST." 

 *'The Alchymist in Search of the Philosopher's stone ; discovers phos- 

 phorus, and prays for the successful conclusion of his operation, as was 

 the custom of the ancient chymical astrologers." 



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