xxiv.] SPOT INVERSIONS. 337 



vary in each case, as far as can be, the temperature employed. 



i, * 

 H I 

 s S 



ti 



5 



^ 



|* 



II 



la 



u 41 

 s 2 



d < 



II 



^ ft 



4 



o 



'bC 



For instance, when we use the quantity coil we use a large jar, a 

 little jar, or no jar at all ; and the same with the intensity coil. 





