The Analytic Theory of Heat Quotes
History of mathematics, History of physics, Mathematics books, Physics books
Top Quotes
“Thermodynamics”
“Fourier, Joseph”
“History of science”
“Scientific Revolution”
“Entropy (thermodynamics)”
“I have deduced these laws... in the course of several years with the most exact instruments...”
“The notes marked R.L.E. are... from... memoranda on the margin of a copy of... Robert Leslie Ellis.”
“The principles of the theory are derived, as are those of rational mechanics, from a very small number of primary facts...”
“We have... instruments adapted to measure many of these effects... but... not the mathematical demonstration of the laws...”
“The action of heat tends to expand all bodies, solid, liquid or gaseous; this is the property which gives evidence of its presence.”
“When the [heat] source is removed, the line which bounds the ordinates... at the different points will change its form continually.”
“[D]ifferent bodies placed in the same region, all of whose parts are and remain equally heated, acquire also a common and permanent temperature.”
“The proper or interior conducibility of a body expresses the facility with which heat is propagated in passing from one internal molecule to another.”
“These considerations present a singular example of the relations which exist between the abstract science of numbers and natural causes.”
“[T]he action of heat is always present, it penetrates all bodies and spaces, it influences the processes of the arts, and occurs in all the phenomena of the universe.”
“[T]he thickness of the ring is supposed... sufficiently small for the temperature to be... equal at all points of the same section perpendicular to the mean circumference.”
“When all the parts of a solid homogeneous body... are equally heated, and preserve without any change the same quantity of heat, they have also and retain the same density.”
“The tendency [of heat] to uniform distribution and the spontaneous emission which acts at the surface of bodies, change continually the temperature at their different points.”
“No diurnal variation can be detected at the depth, of about three metres [ten feet]; and the annual variations cease to be appreciable at a depth much less than sixty metres.”
“Primary causes are unknown to us; but are subject to simple and constant laws, which may be discovered by observation, the study of them being the object of natural philosophy.”