PASCO TD-8551A MECHANICAL EQUIVALENT OF HEAT - Manual (Page 14)

Mechanical Equivalent of Heat 012-04331E
10
Written by Steven Janke
Reference: Count Rumford of Massachusetts
Thompson, James Alden
Farrar & Rinehart, New York 1935
Count Rumford was a careful observer. He installed a
glass door in his fireplace, watched the flame carefully,
and soon designed better stoves and better chimneys. He
built up quite a reputation as a nutritionist; he wrote
several essays on the benefits of coffee over tea. Many
credit him with inventing the folding bed and he made
many improvements in the design of lamps. His main
scientific accomplishment in later life was his large role
in founding the Royal Institution in 1800. It was Count
Rumford who hired Humphrey Davy as lecturer at the
Institution and it was Count Rumford's money that kept
the Institution going in the beginning. Soon, however,
the Institution became too theoretical for Thompson and
he severed connection with it to move to France. He
died in 1814 of a fever. He left his gold watch to Sir
Humphrey Davy and much of his money to Harvard
University.
Although much of what Benjamin Thompson did in his
lifetime was simply not cricket, he was an "enlightened
philanthropist" and did more for society and science than
most men.
One of the most incredible men associated with science
was Benjamin Thompson, later titled Count Rumford.
Aside from making as many enemies as friends, this man
amassed a large list of honorary titles and contributed
significantly to scientific knowledge. He never let an
opportunity for advancement escape him and many
claimed he had "no real love or regard for his fellow
men." Nevertheless he was one of the first American
scientists and his career was probably the strangest of all
American success stories.
Thompson was born into a Massachusetts farming family
in 1763. He was a strange boy who fancied he could
build a perpetual motion machine and took great interest
in eclipses. He became an itinerant teacher and was hired
by a wealthy family in Rumford, Massachusetts. After
endearing himself to nearly everyone, Benjamin married
the daughter of the household and was accepted into high
society. So favorably did he impress the local military
officers that he was made a major at age 19. This unde-
served honor made him quite unpopular with the local
citizenry. In fact as the political climate ripened for
revolution, Thompson was arrested "upon suspicion of
being inimical to the liberties of this Country." Perhaps
he was a spy, but most likely he was indifferent to the
revolutionary cause. When released he left his wife and
fled to England.
His charming manner and good looks won the friendship
of the War Minister and soon he was elected to the Royal
Society and named Under Secretary in the War Depart-
ment. He returned to America to command the Queen's
Horse Dragoons against the colonists. During this time
he strangely enough began systematic lunar observations
and extensive experiments with gunpowder and shell
velocity.
At age 30 he returned to England and traveled to Bavaria.
He won the friendship of the duke of Bavaria and in due
time was made a Count of the Holy Roman Empire—
Count Rumford. Thompson was bright enough and had
enough power to apply his cherished ideas of enlightened
despotism; he established a successful welfare system in
Munich.
This was the time he made his greatest contribution to
science. While watching a cannon being bored he noted
the extreme amount of heat produced. After careful
experiments he was able to deduce that heat was molecu-
lar motion, not a fluid. This was a breakthrough.
Benjamin Thompson
1763-1814
The Incredible Career of Count Rumford