4 



Prof. T. S. Humpidge. 



Several attempts were made to determine the density of this block 

 of metal. They were all unsuccessful, owing to the difficulty of com- 

 pletely removing the enclosed air. 



Another sample was therefore used in the loose form as extracted 

 from the iron boats. The following results were obtained : — 

 di%= 1-88 (i), 1-90 (ii); mean = 1-89. 

 The composition of this metal was — 



Gl 99-00 



GIO 0-43 



Fe 0-57 



100-00 



and making allowance for these impurities the true density of gluci- 

 num becomes d|^=l*85. 



Fig. 1. 



Owing to the small amount of substance used (about 59 mgrms.), 

 the result is only accurate to the second decimal place. 



