PHYSICAL anp LITERARY. 247 
weakly than it does the vitriolic, and is 
converted into falt-petre. 
From fome of the above experiments, | 
it appears, that a few alterations may be 
made in the column of acids in Mr Geof- 
froy’s table of elective attractions, and 
that a new column may be added to that 
table, according to the following {cheme, 
where the alkaline fubftances are all con- 
fidered as in their pure ftate and free of 
fixed air. 
Acids. Fixed air. 
Fixed alkali, Calcarious earth. 
Calcarious earth, Fixed alkali. 
Volatile alkaliand magnefia, Magnefia. 
* + #* © € & Volatile alkali. 
* * @ & 
AT the foot of the firft column eter 
__ of the metals might follow, and after thefe 
the earth of alum; but, as I don’t know 
_ what number of the metals fhould pre- 
cede that earth, I have left it to be deter- 
Mined by further experience. 
THE. 
