SHUDDEMAGEN. — RESIDUAL CHARGES IN DIELECTRICS. 511 



It occurred to the writer that perhaps thin sheets of paraffin might be 

 made by the same method which is used to obtain thin sheets of bees- 

 wax, such as are manufactured into " comb foundation " for use in 

 modern apiaries. A trial experiment on a small scale proved com- 

 pletely successful. Smooth sheets of paraffin were obtained as thin as 

 sheets of paper and apparently quite homogeneous. Then the neces- 

 sary apparatus was secured to make the sheets of parraffin larger and 



■F 





Figure 12. 

 Side Views of Dipping Tanks. 



in great numbers. Two tanks were constructed (Figure 12) by a plum- 

 ber, according to the following specifications : The material used 

 was galvanized sheet iron (copper sheeting, however, would be more 

 durable). One tank, which was to hold hot paraffin, was to hang in- 

 side the other one, in which water was to be kept heated to the proper 

 temperature by means of Bunsen burners. The dimensions were : 

 inner tank: height, 61 cms., base, 30.5 by 5.1 cms.; outer tank: 

 height, 63.5 cms., base 35.6 cms. by 10.5 cms. The inner tank had 

 three projecting strips of galvanized iron, bent down near their ends, 



