254 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



sheet metal (A, figs. 51 and 52) lined with rubber B, and a metal clip or 

 small bolt C, to draw the ends of the band toward each other. In order 



Fig. 51. 



to leave an opening for the introduction of fluid the ends of the band 

 do not quite meet. Short strips of rubber, D, are solutioned on to the 

 rubber lining. These serve to keep the glass sides the desired distance 



&£y 



Fig. 52. 



apart. Fig. 51 shows a tank ready for use, and intended- [to be 

 attached to an ordinary bull's-eye condenser stand. The glass sides 

 recommended are bevel-edsed clock glasses, obtainable in sizes* from 



