MODELLING-GLUES 269 



properties of glycerin as an aid to elastic or glue compositions 

 was Dr. Cathcart, in 1885, whose method is described by- 

 Hamilton.^ 



The next published was — 



94. — Shufeldt's American Modelling-glue (see P.Z.S., 1894, p. 136) 



Glue (best Irish) . . . . . 4 oz. 



Gelatin (photographers') . . . . 2 ,, 



Glycerin . . . . . . 4 ,, 



Boiled oil . . . . . • \ it 



This has been well tried in the Leicester Museum, but has 

 not been found to dissolve nor unite, owing, probably, to the 

 omission of any directions for its preparation, and also to the 

 want of water, which is not mentioned. Moreover, the utility 

 of gelatine is by no means apparent, its cost is great, and 

 " boiled oil," as will be seen from subsequent remarks, is, neither 

 in colour nor quality, of the same value as linseed-oil. 



The following are those used with the best results in the 

 Leicester Museum : — 



95.— Modelling-glue (M.B.) 



Glue (best Scotch) . . . .6 parts 



Water . . . . i „ 



Glycerin . . . . . 6 , 



Linseed-oil . . . . • 3 „ 



This, it will be seen, makes i lb. of composition, which, in 

 a water bath over a spirit-lamp, takes three hours, with constant 

 stirring, to prepare. 



96.— Modelling-glue (M.B.) 



Glue (best Scotch) 

 Water . 

 Glycerin 

 Linseed-oil 



6 parts 



', pp. 716-718 



