Alonzo B. Cornell, son of the founder of Cornell University, at one time
Governor of New York, was intimately connected with electrical and
telegraphic affairs for many years; therefore on the subject here
presented he speaks with professional authority. His father was the
first builder of the Morse telegraphs.

* * * * *

During the early years of the nineteenth century but slight advance was
made in the development of electrical science, although there were many
persons both here and abroad engaged in experimental work, and there was
considerable increase of literature bearing upon the subject. It was
reserved for another illustrious American to accomplish the next
important and decisive step in the pathway of progress. In 1828 Joseph
Henry, then professor of physics at the Albany Academy, afterward a
professor at Princeton, and subsequently for many years secretary of the
Smithsonian Institution at Washington, made the highly important
discovery that by winding a plain iron core with many layers of
insulated wire, through which the electric current was passed, he could
at pleasure charge and discharge the iron core with magnetic power. Thus
Henry produced the electromagnet which was the beginning of the mastery
by man of the subtle fluid. He also discovered that the intensity and
power of the electric current were materially augmented by increasing
the number of the series of battery plates without increasing the
quantity of metal used in their construction.

These discoveries of Henry were, beyond all question, the most important
in real and intrinsic value ever made in the progress of electric
science, as they form the solid basis upon which all subsequent
inventors have been enabled to accomplish successful results in their