Ferguson's Lectures on Select Subjects, in Mechanics, Hydrostatics, Hydraulics, Pneumatics, Optics, Geography, Astronomy, and Dialling: A New Edition Corrected and Enlarged with Notes and an Appendix, Adapted to the Present State of the Arts and Sciencespublished, 1814 - Astronomy |
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Page xxix
... angles , but never going far from either side of it . Sir James's house was full of pictures and prints , several of which I copied with pen and ink this made him think I might become a painter . Lady Dipple had been but a few weeks ...
... angles , but never going far from either side of it . Sir James's house was full of pictures and prints , several of which I copied with pen and ink this made him think I might become a painter . Lady Dipple had been but a few weeks ...
Page 6
... angle of about two or three degrees . Immerse this apparatus about an inch deep in a bason of water , and the water will rise between the plates of glass ; and form a beautiful hypérbola , having for its asymptotes a line parallel to ...
... angle of about two or three degrees . Immerse this apparatus about an inch deep in a bason of water , and the water will rise between the plates of glass ; and form a beautiful hypérbola , having for its asymptotes a line parallel to ...
Page 24
... angles to each other , the ship will describe the line AC in a minute : which line ( because the forces are equal and perpendicu- lar to each other ) will be the diagonal of an exact square . To confirm this law by an ex- periment , let ...
... angles to each other , the ship will describe the line AC in a minute : which line ( because the forces are equal and perpendicu- lar to each other ) will be the diagonal of an exact square . To confirm this law by an ex- periment , let ...
Page 25
... angles to each other , the sides of the parallel- ogram will be so also ; and the diagonal run through by the moving body will be longer or shorter , according as the obliquity is greater or smaller . Thus , if two equal forces act con ...
... angles to each other , the sides of the parallel- ogram will be so also ; and the diagonal run through by the moving body will be longer or shorter , according as the obliquity is greater or smaller . Thus , if two equal forces act con ...
Page 34
... angles to the cord ; and by this means it will ones go round and round upon the board . Then observing with what velocity it moves , pull the cord below the machine , which will bring the bal nearer to the centre of the board , and you ...
... angles to the cord ; and by this means it will ones go round and round upon the board . Then observing with what velocity it moves , pull the cord below the machine , which will bring the bal nearer to the centre of the board , and you ...
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Ferguson's Lectures on Select Subjects in Mechanics, Hydrostatics ... James Ferguson,Robert Patterson No preview available - 2013 |
Common terms and phrases
angle avoirdupois axis axle ball body bottom brass brazen meridian bucket centre of gravity centre of motion centrifugal force circle concave convex glass cornea cubic cylinder degrees diameter divided draw earth ecliptic equal equator equinoctial eye-glass fall feet fixed fluid focal distance focus force go round half heavens hole horizon hour inches inclined plane latitude length lever longitude machine mirror moon move north pole object optic nerve ounces parallel passing perpendicular height pipe piston plane PLATE polar circles pounds pressure prop proportion pulley pump quantity quicksilver raised rays receiver refracted retina right ascension rise rope screw side south pole specific gravities spring square stars sun's place suppose surface telescope tion troy Troy Weight trundle tube turn the globe turned round valve velocity vessel wedge weight wheel whole winch
Popular passages
Page 54 - ... 2. When the prop is at one end of the lever, the power at the other, and the weight between them.
Page xix - Beads upon it, at arms' length, between my eye and the stars ; sliding the Beads upon it till they hid such and such Stars from my eye, in order to take their apparent distances from one another ; and then, laying the Thread down on a Paper, I marked the Stars thereon by the Beads, according to their respective positions, having a Candle by me.
Page xxxv - ... my celestial map, in order to find the two opposite points of the ecliptic in which her orbit crosses it, I was altogether at a loss how and where in the ecliptic (in my scheme) to place these intersecting points : this was in the year 1739. At last, I recollected, that when I was with squire Grant, of...
Page xxvi - I saw the spring box, with part of the chain round it ; and asked him what it was that made the box turn round ? He told me that it was turned round by a steel spring within it. Having then never seen any other spring than that of my father's...
Page xxix - ... sometimes on one side of a plain road and sometimes on the* other, crossing the road at small angles, but never going far from either side of it.
Page xlii - Having never had a grammatical education, nor time to study the rules of just composition, I acknowledge that I was afraid to put it to the press ; and for the same cause, I ought to have the same fears still.
Page xxviii - Two large globular stones stood on the top of his gate ; on one of them I painted (with oil colours) a map of the terrestrial globe, and on the other a map of the celestial...
Page xxvi - But happening one day to see a gentleman ride by my father's house, which was close by a public road, I asked him what o'clock it then was : he looked at his watch, and told me. As he did that with so much...
Page 306 - The hour of the day at any place being given, to find what time it then is at any other place. Bring the given place to the brazen meridian, and set the index, to the given hour; then turn the globe, until...
Page 267 - ... and, consequently, it will magnify so much the more ; for the rays are not coloured by reflection from a concave mirror, if it be ground to a true figure, as they are by passing through a convex-glass, let it be ground ever so true.