MODELLING-COMPOSITIONS, CEMENTS, ETC. 87 



" Marine Glue} — Found in commerce. Carpenter says the 

 best is that known as G K 4. 



" It is soluble in ether, naphtha, or solution of potash. Its 

 use is for attaching glass cells to slides, and for all cases in 

 which it is desired to cement glass to glass. 



" Receipts for preparing it may be found in Beale, p. 49, or 

 in Cooley's Cyclopczdia" 



81. — A Nice Delicate Glue for mounting Ferns and Seaweeds, and a good 

 strong cement for China — will bear considerable rough usage. 



Gum-arabic . . . . .5 parts 



White sugar . . • 3 u 



Starch . . . . . 2 „ 



Add a very Uttle water, and boil until thick and white. ^ 



82.— A Fine Paste (M.B.) 



Best flour . . . 2 02. 



Water . . . . . . 8 „ 



Essence of cloves . . . . • \ 11 



Put part of the water into a basin, and dust in the flour, so 

 stirring it meanwhile with a spoon or spatula as to remove any 

 lumpiness. When worked up as a smooth cream, add the 

 remainder of the water, boil for a few minutes, and turn out 

 into a jar and add the oil of cloves. 



The above is useful for any purpose where cleanness is a 

 desideratum, but, where strength is the chief requirement, finely 

 powdered resin may be added, which, however, detracts from 

 the cleanness. Shoemakers' paste, which is still stronger, and 

 therefore useful for joining paper models, etc., is made with 

 rye-flour and resin. In this case, the addition of alum keeps 

 the paste sweet and strengthens it. 



' Microtomist's Vade-mecum, Lee, pp. 254, 255. 

 ^ Home Notes, vol. v. (1895), p. 28. 



