266 TAXIDERMY AND MODELLING 



comes out perfectly sharp, strong, and exceedingly light, and 

 may be steeped in linseed-oil to toughen and further preserve 

 it, as well as to, render it fit for the reception of colour; this 

 adds but very little to the weight, the model of a i^\ lb. bream 

 weighing but two and a half ounces after steeping. 



Sometimes, for certain objects, more paste and clay may 

 be added than given in Formula 93, but, although probably 

 harder, it is less tough. 



The addition of i oz. of glycerin to the above renders the 

 model slightly elastic and very tough, and can be used in such 

 things as reproductions of seaweeds, but it is difficult to 

 manage, and is better left out for most things. 



A pulp quickly made, not, of course, of such fine quality 

 as Formula 93, but which is valuable for taking the place of 

 clay (see p. TJ^ for inserting within the skin of mammals, 

 birds, and other animals, is thus prepared : — Take pieces of 

 tissue-paper, not too large ; paste them on both sides with the 

 thick paste. Formula 90, and work up with a spatula or knife 

 upon a slab or glass ; as it becomes broken up and pulpy add a 

 little finely-powdered pipe-clay, just sufficient to assist the bind- 

 ing together of the mass. This is much lighter than clay alone, 

 and can be used in all situations where that can be used, and, 

 indeed, surpasses in some cases the cements given for ears, etc., 

 as it does not set so quickly, but, on the other hand, must be 

 more quickly dried artificially, or it is liable to mildew the 

 skin. 



Let it be noted as a valuable trait in the character of all 

 water-paste pulps, that they may be coloured to any tint by the 

 addition of dry powder-colours ; hence very little is needed to 

 finish the colouring of the models of tongues of mammals, 

 those of various anatomical dissections, and of the pileus of 

 fungi. 



The best pulps are also highly valuable in reproducing 



