BOTTLES AND VIALS. 59 
the details of structure. The following conventional colors 
are generally adopted : 
Red, heart and arterial circulation. 
Blue, veinous circulation. 
Green, liver. 
Purple, kidneys. 
Yellow, ovaries. 
Orange, testes. 
Brown, alimentary canal. 
Neutral tint, nerves. 
Large labels can be easily written with the “Audiographic 
Pen,” invented by Mr. D. S. Holman, of Philadelphia. This 
has since been extensively sold under the name of “Automatic 
- shading Pen,” and can be obtained at any stationery store. 
Ca 2 &s =) : ) 
GEV a Ms = 544 = Pn 2 
i a AN vy. EK 
A 4 pe ~—s eS 1) | t= 
— MO —~)) 
