1921] 



TVRKELL. CELLULOID AS A MODELING MEDIUM. 



107 



In the making of models oi fishes, such as those shown in figure 

 55. the prepared celkdoid is laid inside an ordinary plaster mold, 

 which is first freed from all particles of dust and plaster. The 

 l)liable celluloid is then pressed into place with modeling clay, 

 which is carefully applied in small chunks. The nn)ld is next grad- 

 ually filled and allowed to remain for a period of three hours or 

 more, until the celluloid has set. Two sides are made in this man- 

 ner from right and left molds, and the sections trimmed and sealed 



Fig. 55. — Celluloid model of Calico Bass. 



at their edges. They can be painted and mounted in the ordinary 

 way. and, their weight being almost negligible, there is little danger 

 but that they will keep their place. 



Much more might be said of this wonderful material, which has, 

 since its discovery, so quickly become almost indispensible in the 

 arts and of such enormous commercial importance, but it is be- 

 lieved the foregoing brief sketch is sufificient to indicate the many 

 uses to which celluloid may be adapted in connection with the 

 exhibitional material of natural history museums. 



