The steam-engine having furnished us with a means of converting heat into a motive power, and our thoughts being thereby led to regard a certain quantity of work as an equivalent for the amount of heat expended in its production, the idea of establishing theoretically some fixed relation between a quantity of heat and the quantity of work which it can possibly produce, from which relation conclusions regarding the nature of heat itself might be deduced, naturally presents itself. Already, indeed, have many successful efforts been made with this view; I believe, however, that they have not exhausted the subject, but that, on the contrary, it merits the continued attention of physicists... The most important investigation in connexion with this subject is that of S. Carnot.
Rudolf Clausius
Related topics
amount
attention
believe
certain
connexion
continued
contrary
equivalent
establishing
having
heat
idea
investigation
led
might
motive
nature
power
produce
production
quantity
regarding
regard
relation
subject
view
work
means
carnot
presents
steam-engine
Related quotes
Let us not despair; it is a blessed cause, and success, ere long, will crown our exertions. Already we have gained one victory; we have obtained, for these poor creatures, the recognition of their human nature, which, for a while was most shamefully denied. This is the first fruits of our efforts; let us persevere and our triumph will be complete. Never, never will we desist till we have wiped away this scandal from the Christian name, released ourselves from the load of guilt, under which we at present labour, and extinguished every trace of this bloody traffic, of which our posterity, looking back to the history of these enlightened times, will scarce believe that it has been suffered to exist so long a disgrace and dishonour to this country.
William Wilberforce
WHAT HAPPENS AFTER DEATH?
When a human soul goes out of the body, some great mystery happens. For if it is guilty of sins, then there come hordes of demons, evil angels and dark forces, take that soul and drag it to their side.
No one should be surprised at that, because if a man surrendered and fell prey to them while still alive in this world, will not they have even greater control over him and enslave him when he departs from this world?
As for the other, the better part of people, something different happens to them. There are Angels around the holy servants of God in this life; the holy spirits surround them and protect them; and when their souls are separated from the body, the choir of Angels welcomes them into their fellowship, into a bright life, and thus leads them to the Lord.
Macarius of Egypt
Wherever there exists a difference of temperature... it is possible to have also the production of impelling power. ...All substances in nature can be employed for this purpose, all are susceptible of changes of volume, of successive contractions and dilatations, through the alternation of heat and cold. All are capable of overcoming in their changes of volume certain resistances... A solid... A liquid... An aeriform fluid... If it is enclosed in an expansible space, such as a cylinder provided with a piston, it will produce movements of great extent. Vapors of all substances capable of passing into a gaseous condition, as of alcohol, of mercury, of sulphur, etc., may fulfil the same office as vapor of water. ...Most of these... have been proposed, many even have been tried, although... without remarkable success.
Nicolas LĂ©onard Sadi Carnot