XVI 



ATOMIC WEIGHTS OF THE METALS 



365 



oxygen to silver and gold ; this is done with the help of 

 elements such as iodine and mercury, the atomic weights of 

 which can be compared both by means of their vapour 

 densities and by means of their specific heats. 



Abnormal atomic heats. The following table shows the 

 atomic heats, over different ranges -of temperature, of 25 



ATOMIC HEATS OF. SOLID ELEMENTS 



solid elements. Over the range from +20 to +100 the 

 average atomic heat is 6*05 calories. At lower temperatures, 



