W?] 



Davis — Atomic Weight of Thorium. 



49 



. 



(!) Copper Cylinder, sheathed with Asbestos, resting on three-armed 

 Support, clamped to Bnnsen Burner. (2) Platinum Plate, resting on Rose 

 Burner, (3). (4) Platiuum Cylinder resting on Asbestos Mat. (5) Plati- 

 inum Triangle, supported by Platinum Wire Hooks. (6) Asbestos Cover, 

 lined on the inside with Platinum; Hole in center for Thermometer. 



