6 BULLETIN OF THE LABORATORIES 



gather by means of heat. The model is finally glazed over by being 

 held for an instant over a hot flame. 



Some models require mounting on a wooden base while others 

 from the nature and position of the parts represented, show off to bet- 

 ter advantage without any permanent base support. 



Painting. To preserve and beautify the model, it should be 

 painted. This also serves as an excellent means for differentiating the 

 various parts. At Denison University a uniform series of colors are 



Fig. I. 

 used to designate the different tissues. Thus, yellow always indicates 

 nervous tissues, drab is used for epithelial tissue, red for glandular and 

 black for bone and cartilage. White is generally used for painting per- 

 manent bases or supports on which the models are to be mounted. 

 Each color should be laid on and allowed to dry separately. This pre- 

 vents any running together of colors. 



For black, turpentine asphaltum is unexcelled, for red and yellow 

 tube paints answer very well. They require however, to be thinned 

 out with a small cjuantity of turpentine. In fact all paints used for this 



