C 36 ] 



ef Exert only a (mall degree of preflure for the 

 <r firft two or three days ; then examine it, un- 

 cf fold any unnatural plaits, reftify any miftakes, 

 tc and after putting frefh paper over it, fcrew the 

 w prefs harder. In about three days more, fe- 

 <f parate the plant from the pafteboard, if it is 

 u fufficiently firm to allow of a change of place; 

 X( put it upon a frefh pafteboard, and covering it 

 (t with frefh bioilom-paper, let it remain in the 

 <c prefs a few days longer. The prefs fhould 

 " fland in the funfhine, or within the influence 

 " of a fire. 



" When it is perfectly dry, the ufual method 

 " is to fallen it down with pafte or gum-water (g), 

 " on the right-hand inner page of a meet of 



<c into the four corners of one of the planks, and correfpond- 

 f* ing holes made through the four corners of the other plank, 

 <e for the male fcrews to pafs through, fo as to allow the two 

 <f planks to be fcrewed tightly together. It will not be amifs 

 " to face the bearing of the male fcrews upon the wood with 

 <( iron plates ; and if the iron plates went acrofs from corner 

 " to corner of the wood, it would be a good fecurity againft 

 " the warping." 



This note 1 have copied from Dr. Withering's Botanical 

 arrangement, and likew ife the account of drying plants, 

 as his directions are more full and complete than thofe I for- 

 merly introduced into my Naturalift's Companion, An. 1773. 

 Where the convenience of this prefs is not at hand, a fuitable 

 preflure may be made by weights, or any heavy body. 



(i) (< A fmall quantity of finely-powdered arfenic or corrofive 

 r< lublimate is ufually mixed with the pafte or gum-water, to 

 <e prevent the devaftations of infects ; but the feeds of ftaves- 

 ts acre, finely powdered, will anfwer the fame purpofe, without 

 « being liable to corrode, or to change the colour of the more 

 *' delicate plants." 



" large 



