36 DireStions for coliedllng 
long while in good Perfection, if another 
Slip of Glafs, of the fame Length and 
Breadth, be placed over that the Configura¬ 
tions are formed upon, with the Interpo- 
fition only of a very thin Slice of Cork 
between them at each End, to guard the 
Configurations, by keeping the Glades 
afunder, from being any ways rubbed or da¬ 
maged. A little Glew, flrong Gum, or 
flicking Pafte, applied to each Side of the 
Slices of Cork, will fallen the Glaffes fo 
well together as to make of them a Sort 
of Boxes or Cafes, including the Configura¬ 
tions, and defending them from any Injury, 
if the open Sides be fhut up, by palling a 
narrow Slip of Paper over them : but then 
Pin-holes mufl be made through the Paper; 
for if the Air be entirely excluded, the Con¬ 
figurations will foon decay. 
I have now by me feveral of thefe little 
Cafes of Glafs, containing Configurations and 
Cryflals that appear nothing at all thd worfe 
for keeping, though they have been prepar¬ 
ed at leafl four Years. Thefe are always 
ready to fhew in a Minute, without any 
farther Trouble, and are a very pretty and 
curious Set of ObjeCts. The Glaffes for 
them are all cut by the Glazier of thofame 
Size exactly, viz. one Inch and three Quar¬ 
ters long, and almofl an Inch broad. They 
mufl be free from Scratches, Flaws, or Air 
Bubbles. 
The 
