Lectures on Select Subjects in Mechanics, Hydrostatics, Pneumatics, Optics, and AstronomyT. Tegg, 1839 - Всего страниц: 463 |
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Стр. 7
... pump , there will be found no difference . " > 1 . LECT . strongly , as to require. 2. A piece of loaf - sugar will draw up a fluid , and a sponge will draw in water : and on the same principle sap ascends in trees . 3. If two drops of ...
... pump , there will be found no difference . " > 1 . LECT . strongly , as to require. 2. A piece of loaf - sugar will draw up a fluid , and a sponge will draw in water : and on the same principle sap ascends in trees . 3. If two drops of ...
Стр. 10
... pump ; which shews , that although ; the smoke of a candle ascends to the top of a tall receiver when full of air , yet , upon the air's being exhausted out of the receiver , the smoke falls down to J. the bottom of it . So , if a 10 ...
... pump ; which shews , that although ; the smoke of a candle ascends to the top of a tall receiver when full of air , yet , upon the air's being exhausted out of the receiver , the smoke falls down to J. the bottom of it . So , if a 10 ...
Стр. 110
... pumps , can raise two hundred and fifty hogsheads of water ten feet high in an hour . It is a well - known fact , also , that men , when trained to running , are able , on the average of several days being taken , to outstrip the ...
... pumps , can raise two hundred and fifty hogsheads of water ten feet high in an hour . It is a well - known fact , also , that men , when trained to running , are able , on the average of several days being taken , to outstrip the ...
Стр. 124
... when they are designed to be raised higher leys . than the springs , forcing engines must be used ; which shall be described when we come to treat of pumps . LECT . V. A syphon , generally used for decanting 124 FERGUSON'S LECTURES .
... when they are designed to be raised higher leys . than the springs , forcing engines must be used ; which shall be described when we come to treat of pumps . LECT . V. A syphon , generally used for decanting 124 FERGUSON'S LECTURES .
Стр. 128
... pump no pump pump ) , with which we ( improperly called the sucking draw water out of wells , is an engine both pneumatic and hydraulic . It consists of a pipe open at both ends , in which is a moveable piston or bucket , as big as the ...
... pump no pump pump ) , with which we ( improperly called the sucking draw water out of wells , is an engine both pneumatic and hydraulic . It consists of a pipe open at both ends , in which is a moveable piston or bucket , as big as the ...
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angle ascending node axis axle ball body bottom brass brazen meridian center of gravity centrifugal force circle cock cylinder diameter divided draw drawn earth ecliptic edge engine equal equator equinoctial fall feet fixed fluid force gnomon half hole horizon hour-lines inches inclined plane latitude LECT length lever longest day longitude machine mean motion meridian altitude mirror moon move node noon north pole number of degrees object ounces parallel perpendicular pipe piston plane plate polar circles pole pounds pressure pulley pump quadrant of altitude quantity quicksilver raised ratchet-wheel rays refracted right line rise screw semicircle shadow shew side sine south pole specific gravity sphere steam stile sun's declination sun's place surface Troy weight trundle tube turn the globe valve velocity vessel wedge weight wheel whilst whole winch wire
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Стр. 55 - ... 2. When the prop is at one end of the lever, the power at the other, and the weight between them ; 3.
Стр. 164 - I have taken a piece of a whole cannon, whereof the end was burst, and filled it three quarters full of water, stopping and screwing up the broken end, as also the touch-hole ; and making a constant fire under it, within twenty-four hours it burst and made a great crack...
Стр. 50 - From the principles thus established, it is evident that the earth moves round the sun, and not the sun round the earth...
Стр. xlvii - The Art of Drawing in Perspective made Easy to those who have no previous knowledge of the Mathematics.
Стр. xxxiv - During my two years' stay at Edinburgh, I somehow took a violent inclination to study anatomy, surgery, and physic, all from reading of books, and conversing with gentlemen on these subjects ; which, for that time, put all thoughts of astronomy out of my mind, and I had no inclination to become acquainted with any one there who taught either mathematics or astronomy : for nothing would serve me but to be a doctor. At the end of the second year I left Edinburgh, and went to see my father, thinking...
Стр. 405 - ... 49", which wants 28' 11" of being as nearly in conjunction with the same node at the end of the period as it was at the beginning...
Стр. 4 - ... with odoriferous particle.s, yet these bodies lose but a very small part of their weight in a great length of time. Again, it is said by those who have examined the subject with the best glasses, and whose accuracy may be relied on, that there are more animals in the milt of a single cod-fish, than there are men on the whole earth, and that a single grain of sand is larger than four millions of these animals.
Стр. 345 - If a plate similar to this triangle be made as thick as the distance between the lines ac and bd, and set upright between them, touching at a and b, its hypothenuse ag...
Стр. 163 - An admirable and most forcible way to drive up water by fire, not by drawing or sucking it upwards, for that must be as the philosopher calleth it, infra spheeram activitatis, which is but at such a distance. But this way hath no bounder, if the vessels be strong enough ; for I have taken a piece of a whole cannon, whereof the end was burst, and filled it...
Стр. 164 - One vessel of water rarefied by fire driveth up forty of cold water ; and a man that tends the work is but to turn two cocks, that, one vessel of water being consumed, another begins to force and refill with cold water, and so successively, the fire being tended and kept constant, which the selfsame person may likewise abundantly perform in the interim, between the necessity of turning the said cocks.