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 Léonard Sadi CarnotRelated topics
alcohol alternation certain cold condition cylinder difference extent fluid great heat liquid mercury nature office overcoming passing piston possible power produce production purpose solid space success sulphur susceptible temperature try vapor volume water etcRelated quotes
White blood cells and other cells of ours actively seek out and kill foreign microbes. The specific antibodies that we gradually build up against a particular microbe infecting us make us less likely to get reinfected once we become cured. As we all know from experience, there are some illnesses, such as flu and the common cold, to which our resistance is only temporary; we can eventually contract the illness again. Against other illnesses, though-including measles, mumps, rubella, pertussis, and the now defeated smallpox - our antibodies stimulated by one infection confer lifelong immunity. That's the principle of vaccination: to stimulate our antibody production without our having to go through the actual experience of the disease, by inoculating us with a dead or weakened strain of microbe.
Jared Diamond
This Prime Minister must be drummed from office and we will use each and every opportunity to make that a reality...But this Prime Minister deserves to be impeached - and we, with others, will present the case that he should be required to answer...I believe that this Prime Minister now operates outside the currency of debate, beyond the pale of decency...I don't just challenge the policies of Tony Blair, I challenge his morality...This is not a question of this Prime Minister - any prime minister - making a judgement call and just being wrong. It is not a matter, as Blair would have us believe, of someone acting in good faith and making an honest mistake. This is a man who buried the intelligence that was inconvenient, manipulated the information to suit his purpose, and entered into a secret pact with the American President to go to war come what may.
Alex Salmond
In conclusion, it appears to me that nothing can be more improving to a young naturalist, than a journey in distant countries. It both sharpens, and partly likewise allays that want and craving, which, as Sir J. Herschel remarks, a man experiences although every corporeal sense is fully satisfied. The excitement from the novelty of objects, and the chance of success, stimulate him to increased activity. Moreover as a number of isolated facts soon become uninteresting, the habit of comparison leads to generalization. On the other hand, as the traveller stays but a short space of time in each place, his descriptions must generally consist of mere sketches, instead of detailed observation. Hence arises, as I have found to my cost, a constant tendency to fill up the wide gaps of knowledge, by inaccurate and superficial hypotheses.
Charles Darwin
I should want to go home, like Fenella. I should be so tired of the shambles here, the obscurantism, the colour-prejudice, the laziness and ignorance, as to desire nothing better than a headship in a cold stone country school in England. But I love this country. I feel protective towards it. Sometimes just before dawn breaks, I feel that somehow I enclose it, contain it. I feel that it needs me. This is absurd, because snakes and scorpions are ready to bite me, a drunken Tamil is prepared to knife me, the Chinese in the town would like to spit at me, some day a Malay boy will run amok and try to tear me apart. But it doesn't matter. I want to live here; I want to be wanted. Despite the sweat, despite the fever, the prickly heat, the mosquitoes, the terrorists, the fools at the bar of the club, despite Fenella.
Anthony Burgess
Justice is the end of government. It is the end of civil society. It ever has been, and ever will be, pursued, until it be obtained, or until liberty be lost in the pursuit. In a society, under the forms of which the stronger faction can readily unite and oppress the weaker, anarchy may as truly be said to reign, as in a state of nature where the weaker individual is not secured against the violence of the stronger: And as in the latter state even the stronger individuals are prompted by the uncertainty of their condition, to submit to a government which may protect the weak, as well as themselves: so in the former state, will the more powerful factions be gradually induced by a like motive, to wish for a government which will protect all parties, the weaker as well as the more powerful.
Alexander Hamilton
