OF FLORA. 29 



which are to be left in infufion twelve 

 hours •, at the expiration of which time, 

 they are to be repeatedly wafhed in frelh 

 water, as long as any colour proceeds from 

 them. Being dried, they are afterwards 

 dipped in Spirit of Wine, aromatized with 

 Eflential Oil of Cinnamon, Cloves, La- 

 vender, &:c. The fponges are then fit for 

 ufe, and when dried by fqueezirig, are 

 kept in a wide-mouthed glafs- bottle weil 

 corked. 



48. Rules for the prefervatlon of the Teeth 

 and Gums* 



The teeth are bones thinly covered with 

 a fine enamel, which is more or lefs flrong 

 in different perfons. When this enamel is 

 wafted, either by a fcorbutic humour or 

 any external caufe, the tooth cannot long 

 remain found, and muft therefore be clean- 

 til, but with great caution. For this pur- 

 C 3 pofe 



