“Besides these improvements,… there are others,… which may… be interesting to those… engaged in those departments… Among these may be ranked, in the division of mechanics, properly so called, a simple demonstration of the law of the force by which a body revolves in an ellipsis; another of the properties of cycloidal pendulums; an examination of the mechanism of animal motions; a comparison of the measures and weights of different countries; and a convenient estimate of the effect of human labour: with respect to architecture, a simple method of drawing the outline of a column: an investigation of the best forms for arches; a determination of the curve which affords the greatest space for turning; considerations on the structure of the joints employed in carpentry, and on the firmness of wedges; and an easy mode of forming a kirb roof: for the purposes of machinery of different kinds, an arrangement of bars for obtaining rectilinear motion; an inquiry into the most eligible proportions of wheels and pinions; remarks on the friction of wheel work, and of balances; a mode of finding the form of a tooth for impelling a pallet without friction; a chronometer for measuring minute portions of time; a clock escapement; a calculation of the effect of temperature on steel springs; an easy determination of the best line of draught for a carriage; an investigation of the resistance to be overcome by a wheel or roller; and an estimation of the ultimate pressure produced by a blow.”

Preface (August, 1864)
The Mechanical Theory of Heat (1867)

Astronomie élémentaire? (1834) as quoted by Theodore M. Porter, "From Quetelet to Maxwell: Social Statistics and the Origin of Statistical Physics" in The Natural Sciences and the Social Sciences: Some Critical and Historical Perspectives (2013) ed., I. Bernard Cohen

Preface, translation in William Whewell's History of the Inductive Sciences http://books.google.com/books?id=vlQEAAAAQAAJ (1837)
Philosophiae Naturalis Principia Mathematica (1687)

The whole of this part of the subject depends on the consideration of the Intrinsic Energy of a system of bodies, as depending on the temperature and physical state, as well as the form, motion, and relative position of these bodies. Of this energy, however, only a part is available for the purpose of producing mechanical work, and though the energy itself is indestructible, the available part is liable to diminution by the action of certain natural processes, such as conduction and radiation of heat, friction, and viscosity. These processes, by which energy is rendered unavailable as a source of work, are classed together under the name of the Dissipation of Energy.
Theory of Heat http://books.google.com/books?id=DqAAAAAAMAAJ "Preface" (1871)

p, 125
Philosophy of Structures (1958)

Source: The Principles of Political Economy and Taxation (1821) (Third Edition), Chapter XXXII, Malthus on Rent, p. 292

1810s, What do we mean by the American Revolution? (1818)
Context: The colonies had grown up under constitutions of government so different, there was so great a variety of religions, they were composed of so many different nations, their customs, manners, and habits had so little resemblance, and their intercourse had been so rare, and their knowledge of each other so imperfect, that to unite them in the same principles in theory and the same system of action, was certainly a very difficult enterprise. The complete accomplishment of it, in so short a time and by such simple means, was perhaps a singular example in the history of mankind. Thirteen clocks were made to strike together — a perfection of mechanism, which no artist had ever before effected.
In this research, the gloriole of individual gentlemen, and of separate States, is of little consequence. The means and the measures are the proper objects of investigation. These may be of use to posterity, not only in this nation, but in South America and all other countries. They may teach mankind that revolutions are no trifles; that they ought never to be undertaken rashly; nor without deliberate consideration and sober reflection; nor without a solid, immutable, eternal foundation of justice and humanity; nor without a people possessed of intelligence, fortitude, and integrity sufficient to carry them with steadiness, patience, and perseverance, through all the vicissitudes of fortune, the fiery trials and melancholy disasters they may have to encounter.

Tyson and Brother v. Banton, 273 U.S. 418, 451 (1927).

First Memoir.
The Mechanical Theory of Heat (1867)