MISCELLANEOUS. 339 



water, and a white precipitate will be formed, 

 ■which is to be washed and dried. This is white 

 oxyde of bismuth, commonly termed magistery of 

 hismuthy or pearl-xvhite. 



This is used as a cosmetic, and is sold by the 

 perfumers ; but it very much impairs the skin, 

 blackening it by degrees, so that once used, it 

 itnist be continued ; and it is also to be feared, 

 that it has, besides, deleterious effects upon the 

 constitution. 



To procure Anhnakiilce for the Mia^oscope. 



The surface of infused liquors is generally 

 covered with a thin pellicle, which is easily broken, 

 but acquires thickness by standing ; the greatest 

 number of animalculas are generally to be found 

 in this superficial film. 



To malce mi infusion of pepper. — Cover the bot- 

 tom of an open jar, about half an inch thick, with 

 common black pepper, bruised ; pour as much 

 soft water in the vessel as will rise about an inch 

 above the pepper. The pepper and water are 

 then to be well shaken together ; after which they 

 must not be stirred, but be left exposed to the air 

 for a few days, when a thin pellicle will be formed 

 on the surface of the water, containing miUions of 

 animal culae. 



To procure the eels in paste. — Boil a little flour 

 and water till it becomes of a moderate consistence ; 

 expose it to the air in an open vessel, and beat it 

 together from time to time, to prevent the surface 

 from growing hard or mouldy : after a few days, 

 especially in summer time, it will turn sour ; then, 

 if it be examined with attention, you will find 

 myriads of eels on the surface. Apply them to 



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