APPLETONS' CYCLOPAEDIA OF DRAWING1857 |
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Side vii
... Force defined , 105 ; direction of , 105 ; lines formed by three forces , 106 ; forces repre- sented by the sides of a polygon , 107 ; par- allel forces , 108 ; centre of gravity , 109 ; to ascertain its position , 109 . The Mechanical ...
... Force defined , 105 ; direction of , 105 ; lines formed by three forces , 106 ; forces repre- sented by the sides of a polygon , 107 ; par- allel forces , 108 ; centre of gravity , 109 ; to ascertain its position , 109 . The Mechanical ...
Side 105
... Force is that which tends to cause or to destroy motion . The direction of a force is that in which this tendency is exerted ; thus , gravity tends to draw bodies to the earth , and its direction is therefore vertical . Any num- ber of ...
... Force is that which tends to cause or to destroy motion . The direction of a force is that in which this tendency is exerted ; thus , gravity tends to draw bodies to the earth , and its direction is therefore vertical . Any num- ber of ...
Side 106
... forces act- ing on a point are in equilibrium , and lines be measured from this point in the direction of the forces , representing severally in length the relative amount of force exerted by them , then these lines will form the ...
... forces act- ing on a point are in equilibrium , and lines be measured from this point in the direction of the forces , representing severally in length the relative amount of force exerted by them , then these lines will form the ...
Side 107
... force R will be in the direction and equal to the line A e , which com- pletes the polygon . Hence , if we represent in direction and magnitude any number of forces by the sides of a polygon , the force necessary to keep the others at ...
... force R will be in the direction and equal to the line A e , which com- pletes the polygon . Hence , if we represent in direction and magnitude any number of forces by the sides of a polygon , the force necessary to keep the others at ...
Side 108
... force . Parallel Forces . - Forces may act in lines parallel to each other , as in case of two horses harnessed abreast ; and the resultant of any number of forces acting thus and in the same direction must be equal to the sum of the forces ...
... force . Parallel Forces . - Forces may act in lines parallel to each other , as in case of two horses harnessed abreast ; and the resultant of any number of forces acting thus and in the same direction must be equal to the sum of the forces ...
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Appletons' Cyclopædia of Drawing: Designed as a Text-book for the Mechanic ... William Ezra Worthen Uten tilgangsbegrensning - 1857 |
Appletons' Cyclopædia of Drawing: Designed as a Text-book for the Mechanic ... William Ezra Worthen Uten tilgangsbegrensning - 1857 |
Vanlige uttrykk og setninger
arch architecture architrave axis balusters base beam beam compass bisect bolts braces brick cast iron centre circular circumference color compasses cone construction cornice curve cylinder depth determined diagonal diameter direction divide division doors draw drawn edge elevation ellipse entablature epicycloid feet figure floor foot frame frustrum given line given point Gothic horizontal plane inches inclined intersection length light line A B motion mouldings number of equal ornament outline ovolo paper perpendicular pitch circle placed Plate polygon position pressure PROB proportion pulley purlines radii radius rafters regular polygons represent right angles Romanesque roof scale screw shade shaft side soffits space square straight line strain style surface tangent thickness tint tion tooth tracery transverse distance triangle triglyph upper usual velocity vernier scale vertical plane walls weight wheel width wrought iron
Populære avsnitt
Side 3 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Side 2 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a Right Angle; and the straight line which stands on the other is called a Perpendicular to it.
Side 80 - The projection of a point upon a plane is the foot of the perpendicular from the point to the plane.
Side 2 - When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at...
Side 121 - The strength of a pillar, with one end round and the other flat, is the arithmetical mean between that of a pillar of the same dimensions with both ends round, and one with both ends flat. Thus, of three...
Side 33 - This done, press the protractor gently down, which will fix it in position by means of very fine points on the under side. It is now ready to lay off the given angle, or any number of angles that may be required, which is done by turning the pinion d till the opposite vernier reads the required angle. Then press downwards the branches...
Side 117 - VIII, leads to the following remarkable conclusion, easily fixing itself in the memory, that with the unguents, hogs* lard and olive oil interposed in a continuous stratum between them, surfaces of wood on metal, wood on wood, metal on wood, and metal on metal, when in motion, have all of them very nearly the same co-efficient of friction, the value of that co-efficient being in all cases included between 0,07 and 0,08, and the limiting angle of resistance therefore between 4° and 4° 35'.
Side 384 - Having poured a little of the solution into a flat dish, the pictures are to be introduced into it one by one; daylight will not now injure them ; let them soak for two or three minutes, or even longer if strongly printed, turning and moving them occasionally. The remaining unreduced salts of silver are thus thoroughly dissolved, and may now, with...
Side 20 - ... or 2-53, according as the primary divisions are taken as hundreds, tens, or units. General Rule. — To take off any number to three places of figures upon this vernier scale. Increase the first figure by one; subtract the third figure from the second, borrowing one- from- the first increased figure, if necessary, and extend the compasses from the division upon the vernier -scale, indicated by the third figure, to the subdivision indicated by the number remaining after performing the above subtraction.
Side 38 - MOUNTING PAPER AND DRAWINGS, VARNISHING, ETC. In mounting paper upon canvas, the latter should be well stretched upon a smooth flat surface, being damped for that purpose, and its edges glued down as was recommended in stretching drawing paper. Then with a brush spread strong paste upon the canvas, beating it in till the grain of the canvas be all filled up; for this, when dry, will prevent the canvas from shrinking when subsequently removed ; and, having cut the edges of the paper straight, paste...