Natural Philosophy
Just reading through Natural Philosophy, the revised edition embracing THE
MOST RECENT DISCOVERIES in the Various Branches of Physics, and exhibiting The
Application of Scientific Principles in Every-Day Life, by G. P. Quackenbos,
LL. D., printed 1881.
Adapted to use with or without apparatus, and accompanied with full
descriptions of experiments, practical exercises, and numerous illustrations.
I especially liked the descriptions of Properties of Matter including
Density and Rarity.
"The fewer and smaller the pores in a body, the more compact are its
particles and the greater is the weight of a given bulk or Dense. Those with large
or numerous pores are called Rare."
Or, Tenacity, that property by which a body resists a force that tends to
pull it into pieces.
The speed of various objects such as musket-balls, when first discharged is
given as 850 miles per hour. Light is given as 666,000,000 MPH and electricity
is 1,036,800,000 MPH. Electricity in paragraph 772 is given as 11,000 to
288,000 Miles per second, according to its intensity and the nature of the
conductor along which it passes. In the case of the velocity last mentioned, which far exceeds that of light, and is so great as to be absolutely
inconceivable, the conductor was copper wire.
Some of this information must have come from the 1859 and 1871 editions.
The short appendix has short descriptions of the phonograph, telephone and
Edison's electric light. The explanation of how the platinum filaments are kept
at constant temperature are very clever, probably compensating for
variations in the DC supply that Edison favored.
It's worthwhile to note how much better educated we are now and that we
would never make erroneous statements about fundamental knowledge.
MOST RECENT DISCOVERIES in the Various Branches of Physics, and exhibiting The
Application of Scientific Principles in Every-Day Life, by G. P. Quackenbos,
LL. D., printed 1881.
Adapted to use with or without apparatus, and accompanied with full
descriptions of experiments, practical exercises, and numerous illustrations.
I especially liked the descriptions of Properties of Matter including
Density and Rarity.
"The fewer and smaller the pores in a body, the more compact are its
particles and the greater is the weight of a given bulk or Dense. Those with large
or numerous pores are called Rare."
Or, Tenacity, that property by which a body resists a force that tends to
pull it into pieces.
The speed of various objects such as musket-balls, when first discharged is
given as 850 miles per hour. Light is given as 666,000,000 MPH and electricity
is 1,036,800,000 MPH. Electricity in paragraph 772 is given as 11,000 to
288,000 Miles per second, according to its intensity and the nature of the
conductor along which it passes. In the case of the velocity last mentioned, which far exceeds that of light, and is so great as to be absolutely
inconceivable, the conductor was copper wire.
Some of this information must have come from the 1859 and 1871 editions.
The short appendix has short descriptions of the phonograph, telephone and
Edison's electric light. The explanation of how the platinum filaments are kept
at constant temperature are very clever, probably compensating for
variations in the DC supply that Edison favored.
It's worthwhile to note how much better educated we are now and that we
would never make erroneous statements about fundamental knowledge.