THE CHEMISTRY OF LIGHT PRODUCTION 95 



Gaivanometep 



Fig. 33. — Apparatus for determining heat production during luminescence of luciferin. 

 A, special thermos tube. B, Dewar flask for constant temperature junctions. C, double 

 throw switch. D, tube containing luciferin solution. E, tube containing luciferase solution. 

 F, glass rod for breaking E. G, rubber stopper with groove, K, for pulley cord. H, cork 

 closing thermos tube. J, brass sleeve in H allowing rotation of E. L, therm oj unction in 

 luciferase solution. M, thermoj unction in luciferin solution. N, constant temperature 

 junctions. 



the tube containing luciferase solution, this tube could be 

 broken and the luciferase and luciferin solution mixed. 

 It was found that even after the luciferase and luciferin 



