Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This is the case, for instance, when we produce fire by striking flint against steel, or when an iron bar is worked for some time by powerful blows of the hammer.

Each individual fact, taken by itself, can indeed arouse our curiosity or our astonishment, or be useful to us in its practical applications.

The older view of the nature of heat was that it is a substance, very fine and imponderable indeed, but indestructible, and unchangeable in quantity, which is an essential fundamental property of all matter.

I then endeavoured to show that it is more especially in the thorough conformity with law which natural phenomena and natural products exhibit, and in the comparative ease with which laws can be stated, that this difference exists.

Windmills, which are used in the great plains of Holland and North Germany to supply the want of falling water, afford another instance of the action of velocity. The sails are driven by air in motion - by wind.

Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This is the case, for instance, when we produce fire by striking flint against steel, or when an iron bar is worked for some time by powerful blows of the hammer.

The law in question asserts, that the quantity of force which can be brought into action in the whole of Nature is unchangeable, and can neither be increased nor diminished.

Now, the external work of man is of the most varied kind as regards the force or ease, the form and rapidity, of the motions used on it, and the kind of work produced.

Iron which is brought near a spiral of copper wire, traversed by an electrical current, becomes magnetic, and then attracts other pieces of iron, or a suitably placed steel magnet.

Reason we call that faculty innate in us of discovering laws and applying them with thought.

What appeared to the earlier physicists to be the constant quantity of heat is nothing more than the whole motive power of the motion of heat, which remains constant so long as it is not transformed into other forms of work, or results afresh from them.

You all know how powerful and varied are the effects of which steam engines are capable; with them has really begun the great development of industry which has characterised our century before all others.

A raised weight can produce work, but in doing so it must necessarily sink from its height, and, when it has fallen as deep as it can fall, its gravity remains as before, but it can no longer do work.

A moving body whose motion was not retarded by any resisting force would continue to move to all eternity.

But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat.

Not that I wish by any means to deny, that the mental life of individuals and peoples is also in conformity with law, as is the object of philosophical, philological, historical, moral, and social sciences to establish.

A metaphysical conclusion is either a false conclusion or a concealed experimental conclusion.

But heat can also be produced by the friction of liquids in which there could be no question of changes in structure or of the liberation of latent heat.

I am not authorized to fire substitute teachers.

Removing substantial fuel loads from our forests helps prevent catastrophic fire and better protects species, watersheds and neighboring communities that call them home.

A thought often makes us hotter than a fire.

Envy like fire always makes for the highest points.

A leaf fluttered in through the window this morning, as if supported by the rays of the sun, a bird settled on the fire escape, joy in the task of coffee, joy accompanied me as I walked.

From each one of them rose separate columns of smoke, meeting in a pall overhead, and through the smoke came stabbing flashes of fire as German shells burst with thudding shocks of sound. This was the front line of battle.

Not too much, though there's a certain amount of rancour and bitterness when someone tries to fire you.

I was at this casino minding my own business, and this guy came up to me and said, "You're gonna have to move, you're blocking a fire exit." As though if there was a fire, I wasn't gonna run. If you're flammible and have legs, you are never blocking a fire exit.

In all feats of fire-eating it should be noted that the head is thrown well back, so that the flame may pass out of the open mouth instead of up into the roof, as it would if the head were held naturally.

Wise anger is like fire from a flint: there is great ado to get it out; and when it does come, it is out again immediately.

The bourgeois prefers comfort to pleasure, convenience to liberty, and a pleasant temperature to the deathly inner consuming fire.

The best training is to play by ear: trial by fire.

Being thrown into the fire and getting the thing turned around in a hurry made it more difficult. Things have been done the hard way. I think you learn better when things are done the hard way.

Under pressure, people admit to murder, setting fire to the village church or robbing a bank, but never to being bores.

Man is a fire-stealing animal, and we can't help building machines and machine intelligences, even if, from time to time, we use them not only to outsmart ourselves but to bring us right up to the doorstep of Doom.

You can fire your secretary, divorce your spouse, abandon your children. But they remain your co-authors forever.

Life is the fire that burns and the sun that gives light. Life is the wind and the rain and the thunder in the sky. Life is matter and is earth, what is and what is not, and what beyond is in Eternity.

It's not a party until the fire department shows up.

It is your business when the wall next door catches fire.

It is your concern when your neighbor's wall is on fire.

You don't sit up in a cave and write the Great American Novel and know it is utterly superb, and then throw it page by page into the fire. You just don't do that. You send it out. You have to send it out.

Take to every Gallon of Honey, three Gallons of water, and put them both together, and set them over so soft a fire, that you may endure to melt and break the honey with your hands.

There's nothing wrong with the car except that it's on fire.

When it came to political power, blacks need not apply. Add to this steaming stew the growing tensions over the Vietnam War and the movement for civil rights, and you had plenty of elements to fire the imagination of a novice journalist.

God, for example, appealed to me as a beardless man wearing a quilted silk cap; holiness was something burning, forbidding, something connected with fire while a day had the form of an oblong box.

There is in every woman's heart a spark of heavenly fire which lies dormant in the broad daylight of prosperity, but which kindles up and beams and blazes in the dark hour of adversity.

It is not light that we need, but fire; it is not the gentle shower, but thunder. We need the storm, the whirlwind, and the earthquake.

Words are only painted fire; a look is the fire itself.

No. Better research needed. Fire your research person. No fishnet stockings. Never. Not in this band.

I don't have the fire in the belly right now. It's one of those been there, done that deals.

I am building a fire, and everyday I train, I add more fuel. At just the right moment, I light the match.