By another way, therefore, I endeavoured to attain the same end; and since it is a property of water that a small quantity of it, converted into steam by the force of heat, has an elastic force like that of the air, but, when cold supervenes, is again resolved into water, so that no trace of the said elastic force remains; I felt confident that machines might be constructed wherein water, by means of no very intense heat, and at small cost, might produce that perfect vacuum which had failed to be obtained by aid of gunpowder. But of the various constructions which can be contrived for this purpose, the following seemed to me to be the most suitable.
Denis PapinRelated topics
air cold cost elastic end felt following force heat might perfect produce property purpose small water way remains meansRelated quotes
Hence the ancient architects, following in the footsteps of nature, perfected the ascending rows of seats in theatres from their investigations of the ascending voice, and by means of the canonical theory of the mathematicians and that of the musicians, endeavoured to make every voice uttered on the stage come with greater clearness and sweetness to the ears of the audience. For just as musical instruments are brought to perfection of clearness in the sound of their strings by means of bronze plates or horn, so the ancients devised methods of increasing the power of the voice in theatres through the application of harmonics.
Vitruvius
Do everything simply and meekly. Do nothing with an ulterior motive. Don't say, I'll do this in order to have that result, but do it naturally, without taking cognizance of it. That is, pray simply and don't think about what God will bestow on your soul. Don't make any calculations. You know, of course, what God bestows when you enter into communion with Him, but it is as if you don't know. Don't discuss the matter even with yourself. So when you repeat the prayer, "Lord Jesus Christ, have mercy on me”, say it simply and ingenuously and think of nothing other than the prayer. These are very delicate matters and the intervention of the grace of God is required.
Porphyrios of Kafsokalyvia
Josh's actions when he was an underage teen are as he described them himself, 'inexcusable,' but that doesn't mean 'unforgivable.' He and his family dealt with it and were honest and open about it with the victims and the authorities. No purpose whatsoever is served by those who are now trying to discredit Josh or his family by sensationalizing the story. Good people make mistakes and do regrettable and even disgusting things. [...] They are no more perfect a family than any family, but their Christian witness is not marred in our eyes because following Christ is not a declaration of our perfection, but of HIS perfection. [...] Let others run from them. We will run to them with our support.
Mike Huckabee
If the water flow down by a gradual natural channel, its potential energy is gradually converted into heat by fluid friction, according to an admirable discovery made by Mr Joule of Manchester above twelve years ago, which has led to the greatest reform that physical science has experienced since the days of Newton. From that discovery, it may be concluded with certainty that heat is not matter, but some kind of motion among the particles of matter; a conclusion established, it is true, by Sir Humphrey Davy and Count Rumford at the end of last century, but ignored by even the highest scientific men during a period of more than forty years.
William Thomson
Philosophers are generally persuaded, that the sensations of heat and cold are occasioned by the presence or absence, in degree, of certain principle or quality denominated fire or heat... It is most probable, that all substances whatever contain more or less of this principle. Respecting the nature of the principle, however, there is a diversity of sentiment : some supposing it a substance, others a quality, or property of substance. Boerhaave, followed by most of the moderns, is of the former opinion; Newton, with some others, are of the latter; these conceive heat to consist in an internal vibratory motion of the particles of bodies.
John Dalton