OF FLORA. 29 



which are to be left in infuflon twelve 

 hours; at the expiration of which time, 

 they are to be repeatedly warned in frefh 

 water, as long as any colour proceeds from 

 them. Being dried, they are afterwards 

 dipped in Spirit of Wine, aromatized with 

 EiTential Oil of Cinnamon, Cloves, La- 

 vender, he. The fponges are then fit for 

 ufe, and when dried by fqueezing, are 

 kept in a wide-mouthed glafs-bottle well 

 corked. 



48. Rules for the Prefervation of the Teeth 

 and Gums. 

 The teeth are bones thinly covered with 

 a fine enamel, which is more or lefs ftrong 

 in different perfons. When this enamel is 

 wafted, either by a fcorbutic humour or 

 any external caufe, the tooth cannot long 

 remain found, and mult therefore be clean- 

 ed, but with great caution. For this pur- 

 C 3 pofe 



