1968
@incollection{Kel1891,
vgclass = {refpap},
author = {{William Thompson, Lord Kelvin}},
title = {Popular Lectures and Addresses, 1891--1894},
editor = {Emily Morison Beck},
address = {Boston, U.S.A.},
publisher = {Little, Brown and Company},
year = {1968},
abstract = {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 meager and unsatisfactory kind: it may be the beginning of knowledge,
but you have scarcely, in your thoughts, advanced to the stage of
science.},
}