IOWA ACADEMY OP SCIENCES. 
37 
THE REDUCTION OF SULPHURIC ACID BY COPPER 
AS A FUNCTION OF THE TEMPERATURE. 
LAUNCELOT W. ANDREWS. 
The object of the experiments described in this paper was 
to determine whether the reduction of sulphuric to sulphurous 
acid by copper takes place at a lower or at a higher temper- 
ature than the incipient dissociation of the former compound 
into water and the acid anhydride. 
The sulphuric acid employed was the ordinary pure product, 
containing 98.4 per cent of SO^. The apparatus illustrated 
in the figure was used. 
The method employed was to heat the copper with the sul- 
phuric acid (in flask B) gradually in a sulphuric acid bath while 
