UTAH ACADEMY OF SCIENCES 63 
THE RUSTING OF IRON. 
By C. W. PORTER. 
(Abstract. ) 
A discussion of the chemical and _ electro-chemical 
theories of corrosion. The chemical composition and physi- 
cal properties of paints and other protective coverings in- 
tended to retard corrosion—tThe catalytic influence of cer- 
tain paints accelerating rather than retarding rusting. An 
exhibit of iron in contact with other metals was presented 
with an explanation of the electro-chemical effects of vari- 
ous couples on the rate of corrosion of the iron. 
