350 HISTORICAL INTRODUCTION TO CHEMISTRY CHAP 

 5. SULPHUR COMPOUNDS. 8 = 32. 



The atomic weight of sulphur is seen to be 32. At 

 temperatures above 1000 the vapour has a molecular weight 

 64 ; the molecules of the gas are then diatomic like those 

 of hydrogen, chlorine, nitrogen and oxygen. But at lower 



6. . CARBON COMPOUNDS. C = 1 2. 



1 See footnote on p. 351. 



