electromagnetic coil
Date1900-1950
Inventory Number2007-1-0099
ClassificationCoil
Subject
Maker
American
?
Cultural Region
Dimensions12.5 × 112 × 12.5 cm (4 15/16 × 44 1/8 × 4 15/16 in.)
Material
DescriptionLong heavy coil wrapped with 300+ turns of thin twine (according to the tag, 339 turns on outer layer). The twine may insulate an even thinner wire inside. One end of the coil is circular; the other end is square and has four electrodes.
Signedunsigned
Inscribedon round end, in green paint (parts are illegible): R.PHY.
on electrode end, hand-stamped into two of four outer edges: T.S. 2637 + 2637 EACH COIL / H = < 30.91 + 30.91 > I
on small and brittle vintage tag: 339 turns on outer layer
FunctionProduces a (large) magnetic field when an electric current is run through it.
Date: late 19th-early 20th Century
Object number: RS0168
Department of Physics, Harvard University
Date: late 19th-early 20th Century
Object number: 0504
Date: 1890-1930
Object number: RS0508
