P/ul. Trctrui. ^ vol. 



fferential Thermometer. 



Thermometer 



To Battery. 



Platinum Wire Bridge 

 Gun cotton. 



Circulator 



Distilled water 

 Water. 



~ -|j/ Explosion Vessel 



All surfaces electro-plated 

 except that of the outer vessel . 



;_ _ _ / c , , 



_ _ ~ J / PI Stays. 



