William Thomson: Quotes about science

“There cannot be a greater mistake than that of looking superciliously upon the practical applications of science. The life and soul of science is its practical application; and just as the great advances in mathematics have been made through the desire of discovering the solution of problems which were of a highly practical kind in mathematical science, so in physical science many of the greatest advances that have been made from the beginning of the world to the present time have been made in earnest desire to turn the knowledge of the properties of matter to some purpose useful to mankind.”

William Thomson

Lecture on "Electrical Units of Measurement" (3 May 1883), published in Popular Lectures Vol. I, p. 73, as quoted in The Life of Lord Kelvin (1910) by Silvanus Phillips Thompson

Life , World , Soul , Mathematics

“I need scarcely say that the beginning and maintenance of life on earth is absolutely and infinitely beyond the range of sound speculation in dynamical science.”

William Thomson

As quoted in The Life of Lord Kelvin (1910), by Silvanus Phillips, Volume 2, (2005 edition, . p. 866)

Life , Science

“Tesla has contributed more to electrical science than any man up to his time.”

William Thomson

Statement of 1896, as quoted in Prodigal Genius : The Life of Nikola Tesla (2007) by James J. O'Neill

Science , Time

“I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science, whatever the matter may be.”

William Thomson

Lecture on "Electrical Units of Measurement" (3 May 1883), published in Lectures Vol. I, p. 73 https://archive.org/stream/popularlecturesa01kelvuoft#page/73/mode/1up|Popular

Knowledge , Science

“If the water flow down by a gradual natural channel, its potential energy is gradually converted into heat by fluid friction, according to an admirable discovery made by Mr Joule of Manchester above twelve years ago, which has led to the greatest reform that physical science has experienced since the days of Newton. From that discovery, it may be concluded with certainty that heat is not matter, but some kind of motion among the particles of matter; a conclusion established, it is true, by Sir Humphrey Davy and Count Rumford at the end of last century, but ignored by even the highest scientific men during a period of more than forty years.”

William Thomson

Mathematical and Physical Papers, Vol.2 http://books.google.com/books?id=kNrVAAAAMAAJ (1884) "On Mechanical Antecedents of Motion, Heat and Light" (originally published 1854, 1855)
Thermodynamics quotes

Men , Nature , Water , Science

“Now I think hydrodynamics is to be the root of all physical science, and is at present second to none in the beauty of its mathematics.”

William Thomson

Source: In a letter addressed to George Stokes dated December 20, 1857, as quoted in Fluid Mechanics in the Next Century https://doi.org/10.1115/1.3101925 (1996), by Mohamed Gad-el-Hak and Mihir Sen.

Beauty , Thinking , Mathematics , Science