8 Electro-Magnetic Machine. 
Claim of Thomas Davenport. 
In the words of the patent, taken out, this invention “ consists in 
applying magnetic and electro-magnetic power as a moving principle 
for machinery, in the manner described, or in any other substantially 
the same in principle.” 
“‘Mr. Davenport first saw a galvanic magnet in December, 1833, 
and from the wonderful effects produced by suspending a magnet of 
150 lbs. from a small galvanic battery, he immediately inferred, 
without any knowledge of the theory or the experiments of others, 
that he could propel machinery by galvanic magnetism. He pur- 
chased the magnet and produced his first rotary motion in July, 1834. 
In July, 1835, he submitted his machine to Prof. Henry, of Prince- 
ton, New Jersey, also without any knowledge of Prof. Henry’s ex- 
periments in producing a vibratory motion. From this gentleman he 
received a ee testifying to the originality and importance of 
the invention.” 
Mr. Davenport is, by occupation, a blacksmith, with only a com- 
mon education, but with uncommon intelligence ;_ his age about thirty 
five. Mr. Ransom Cook, of Saratoga Springs, is associated with 
Mr. Davenport, and has rendered essential service by the improve- 
ments he has made in the machine, and by his assistance in bringing 
the subject before the public in the most effectual way. Arrange- 
ments have been made to take out the patent in Europe. 
P.S. The proprietors are constructing a machine of seven inches 
in diameter, and also one of two feet in diameter. Galvanic mag- 
nets will be used as the moving and stationary magnets of each. 
