An essay on mechanical geometry, explanatory of a set of models1796 |
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Página 2
... ruler ; and is the nearest distance . between its two extreme points . 4. But , if the point in motion be con- tinually changing its direction , it then defcribes a crooked line , and is named a F. 2. Curve . Note , For the future ...
... ruler ; and is the nearest distance . between its two extreme points . 4. But , if the point in motion be con- tinually changing its direction , it then defcribes a crooked line , and is named a F. 2. Curve . Note , For the future ...
Página 3
... ruler , in any direction whatever , it will touch it in every part . Such is the upper furface of a well - planed table . 8. A Convex Surface is a furface that rifes upward , as the outward furface of a chrystal of a watch . Саме 9. A ...
... ruler , in any direction whatever , it will touch it in every part . Such is the upper furface of a well - planed table . 8. A Convex Surface is a furface that rifes upward , as the outward furface of a chrystal of a watch . Саме 9. A ...
Página 47
... ruler . Euclid's method of drawing parallel lines is true in theory but not in practice . The eafieft and beft methods , if you have not a parallel ruler , are those de- fcribed in this and the next Problem . Let AB be the given line ...
... ruler . Euclid's method of drawing parallel lines is true in theory but not in practice . The eafieft and beft methods , if you have not a parallel ruler , are those de- fcribed in this and the next Problem . Let AB be the given line ...
Página 54
... ruler on the line 2 , 1 ; move the table about till the ruler is in a line with A ; then direct the ruler to the places C and D , and draw lines to interfect thofe drawn when the table was at the first station , and the places of ...
... ruler on the line 2 , 1 ; move the table about till the ruler is in a line with A ; then direct the ruler to the places C and D , and draw lines to interfect thofe drawn when the table was at the first station , and the places of ...
Página 88
... ruler , with holes , as described in the Paradox ; and also a piece of wood in form of a wedge , with a circular base . It is manifeft , the base being a circle will fill a round hole ; if the piece be put in the flat way , it fills the ...
... ruler , with holes , as described in the Paradox ; and also a piece of wood in form of a wedge , with a circular base . It is manifeft , the base being a circle will fill a round hole ; if the piece be put in the flat way , it fills the ...
Otras ediciones - Ver todas
An Essay on Mechanical Geometry, Explanatory of a Set of Models Benjamin Donne Sin vista previa disponible - 2019 |
An Essay on Mechanical Geometry, Explanatory of a Set of Models Benjamin Donne Sin vista previa disponible - 2016 |
Términos y frases comunes
180 degrees alfo alſo Analemma angle ACD arithmetic arithmetical mean bafe baſe bifect Book breadth Briſtol called circle circumfcribing compaffes conceived cone confequently contained Corollary croffing cylinder demonftrations deſcribe diameter diſtance divided effay Euclid exactly expreffed faid fame number femicircle fhall fhewn fhould fides fignifies figure fimilar fmall folid fome four numbers fquare feet fruftum ftands ftraight fubtract fufficiently furface gallons geometrical mean Geometricians Geometry globe height Hence inftance interfect large cube length manifeft meaſure multiply half muſt number of degrees number of feet numbers are proportional oppofite orem parallel lines parallel ruler parallelogram perpendicular planes pofition pole prefent priſm PROBLEM propofitions purpoſe pyramid radius reaſon rectangle regular polygon repreſent reſpect rhombus right angles right line ſcheme Scholium ſet ſhadow ſhall ſquare Theorem theſe Thomas Beddoes thoſe three angles triangle ABC whole yards
Pasajes populares
Página 4 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Página 11 - Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another.
Página 23 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz. either the sides adjacent to the equal...
Página 24 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Página 12 - ... the three angles of a triangle are together equal to two right angles, although it is not known to all.
Página 37 - A right circular cone is often called a cone of revolution, because it can be generated by the revolution of a right-angled triangle about one of its shorter sides.
Página 10 - POSTULATES. 1. LET it be granted that a straight line may be drawn from any one point to any other point. 2. That a terminated straight line may be produced to any length in a straight line. 3. And that a circle may be described from any centre, at any distance from that centre.
Página 65 - Multiply half the circumference by half the diameter, and the product will be the area. Or, divide the product of the whole circumference and diameter -by 4, and the quotient will be the area. 2. Multiply the square of the diameter by .7854, and the product will be the area.
Página 84 - ... reafonable creatures •, for though we all call ourfelves fo, becaufe we are born to it if we pleafe, yet we may truly fay Nature gives us but the...
Página 40 - SIMILAR cones and cylinders have to one another the triplicate ratio of that which the diameters of their bases have...