Page:Text-book of Electrochemistry.djvu/41

 24 OLDER ELECTROCHEMICAL VIEWS, chap. ii.

only at high temperatures, and possessed an excess (one atomic charge) of one kind of electricity. Nitric oxide (NO), which has one free valence, offered a great difficulty in this con- nection, for it is stable at the ordinary temperature, and does not conduct the current.

In concluding, Helmholtz remarked on the great im- portance of electrochemistry.

�� �