Microscopical Essays. 



l 57 



ft is not practicable to extend the body, and feparate the arms on 

 the talc, without tearing them to pieces : fo that the only method 

 is, to adjuil them upon the talc while in the fpirits ; this may be 

 done by flipping the talc under the body of the polype, while it 

 lies in the fpirits, and difplaying it's arms thereon by the fmall 

 hair pencil and a pair of nippers ; then lift the talc, with the 

 polype upon it, out of the fpirits; take hold of it with the nip- 

 pers in the left hand, dip the pencil in the fpirits with the right 

 hand, and therewith difpofe of the ftveral parts, that they may 

 lie in a convenient manner, at the fame time braining away any 

 lice that may be feen upon the talc ; now let it dry, which it 

 does in a little time, and place the talc carefully in the hole of 

 the Aider. To prevent the upper talc and ring preffing on the 

 polype, you mull cut three pieces of cork, about the bignefs of a 

 pin's head, and the depth of the polype, and fix them by gum 

 in a triangular petition, partly on the edges of the faid talc, 

 partly to the fides of the ivory hole itfelf ; the upper talc may 

 then be laid on thefe corks, and prefTed down by the ring as 

 ufuaL* 



Of Vegetables. 



I wifh I could give the reader a fatisfa&ory account of all the 

 preparations which are requifite to fit for the microfcope the ob- 

 jects of the vegetable kingdom. Dr. Hill is the only writer who 

 has handled this fubjea. I (hall, therefore, extraft from his 

 «< Treatife on the Conftruaion of Timber," what he has 

 faid ; this, together with the improvements I have made on the 



cutting 



* Baker on the Polypes. 



