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.

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.

Photography is a major force in explaining man to man.

If you want something that's going to provide you with a lot of challenges and a variety of different things to do, then you really can't beat a place like the Air Force. I don't mean this to sound like a recruiting pitch. But it's been a lot of fun.

We need to begin an all-out diplomatic offensive on Darfur in order to prepare the way for a peacekeeping force that can ensure protection for the people of Darfur.

The most important quality in a leader is that of being acknowledged as such. All leaders whose fitness is questioned are clearly lacking in force.

Capital is a result of labor, and is used by labor to assist it in further production. Labor is the active and initial force, and labor is therefore the employer of capital.

All that a good government aims at... is to add no unnecessary and artificial aid to the force of its own unavoidable consequences, and to abstain from fortifying and accumulating social inequality as a means of increasing political inequalities.

It is the tendency of the social burdens to crush out the middle class, and to force society into an organization of only two classes, one at each social extreme.

No doubt Western civilization has in the past been full of wars and revolutions, and the national elements in our culture, even when they were ignored, always provided an unconscious driving force of passion and aggressive self-assertion.

We need a strong police force - the Interior Ministry of the Republic of Chechnya. We have to get rid of the traitors who have managed to penetrate into the law-enforcement department.

From the long range point of view, I do not know of anything we can do more important than to make some contribution to the preservation of religion as a vital force in America.

The increase of territory and power of empires by force of arms has been the policy of all great powers, and it has always been possible to get the approval of their state religion.

The exact measure of the progress of civilization is the degree in which the intelligence of the common mind has prevailed over wealth and brute force.

The dedication of the United States Air Force, Special Forces, and others involved in the mission to tracking down terrorists can not be matched. We express our gratitude to these men and women who defend the freedom America represents.

My mom and dad met at UCLA when he as a captain in the Air Force and she was in her junior year.

We believe, in fact, that the one act of respect has little force unless matched by the other - in balance with it... The acting out of that dual respect I would name as precisely the source of our power.

Our little force will march on tomorrow or the day after.

There are not as many women who support the national defense budget now as men. I really think there is a gender gap in the support for the large expenditures that are necessary to modernize the force.

We believe the use of force against Iraq, especially with reference to previous resolutions of the UN Security Council, has no grounds, including legal grounds.

If you are not prepared to use force to defend civilization, then be prepared to accept barbarism.

It's an old adage that the way to be safe is never to be secure... Each one of us requires the spur of insecurity to force us to do our best.

Indiscriminate firing by police on people is absolute barbarism. Instead of solving their problems, the government is trying to suppress the people by force.

We must not enable anyone to impose his personal view regarding religion on others by force, oppression, or pressure.

My mother was a dominant force in my life. She had a very specific idea about education, which was: you should know everything about everything. It was quite simple. There was no exclusivity, and there really was no judgment.

It is the artist who realizes that there is a supreme force above him and works gladly away as a small apprentice under God's heaven.

Through the wholesale destruction of the representatives of a class that from the beginning of history had been the directing and creative force in civilization, a process began which was almost mechanical.

It is astonishing what force, purity, and wisdom it requires for a human being to keep clear of falsehoods.

That's why I ended up leaving school - because it required so much time, and it was such an excellent idea. I figured I would regret not going full force with this idea. It seemed we could make something of it.

What force is more potent than love?

Yet, history has shown that if material force can defeat some ideologies it can no longer obliterate a civilization without destabilizing the whole planet.

There's nothing like a family crisis, especially a divorce, to force a person to re-evaluate his life.

It becomes a giant's task to compute the result when the effect of cross seas, wind at all angles and ever varying force, arched surfaces, head resistance, ratio of weight to area, and the intelligence of the guiding power crop up.