1831] WRITINGS OF JOSEPH HENRY. 49 



Prof. Moll's paper on Electro-Magnetism. Some of his 

 results are, in a degree, similar to those here described: his 

 object, however, was different, it being only to induce strong 

 magnetism on soft iron with a powerful galvanic battery. 

 The principal object in these experiments was to produce the 

 greatest magnetic force, with the smallest quautit}' of gal- 

 vanism. The only effect Prof. Moll's paper has had over 

 these investigations, has been to hasten their publication : 

 the principle on which they were instituted was known to 

 us nearly two years since, and at that time exhibited to the 

 Albany Institute. 



