Anthracite of the Calton Hill. 5 



thracite. The imperfections of the analytical methods at 

 that time, however, led Lampadius to draw false conclusions 

 from his analytical results, and induced him to consider all 

 anthracites as hydrates ; but we know at present that the 

 hydrogen and oxygen in anthracite are not united as water. 

 Though mistaken in his quantitative analyses, Lampadius, 

 nevertheless, has the credit of having pointed out the quali- 

 tative composition of several varieties of anthracite more ac- 

 curately than any chemist who examined this mineral before 

 him. In all samples he detected carbon, oxygen, hydrogen, 

 nitrogen, and sulphur, besides the ash, or the same substances 

 which were found to enter into the composition of the anthra- 

 cite of the Calton Hill. 



