metric Yacuum (?) both thè live inseot and 
thè luirinous organ continued tc glow, thè 
latter Tout feebly in a vacuuin* 
His discussion of thè thecry involvs thè 
supposi tion of thè existenoe of calorie and 
cf a material cf light. He cornpares thè 
light to that cf calciimfi sulfide The paper 
ends v;ith a few ccmmerits on thè hahits cf thè 
Lampyridae. 
