## A graduated course of problems in practical plane and solid geometry |

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Side

... a parallel straight line . 7 . The Rolling Parallel Ruler . This instrument consists

of a ruler , AB , generally divided into inches and tenths ; near the extremities are

placed two rollers turning on an

... a parallel straight line . 7 . The Rolling Parallel Ruler . This instrument consists

of a ruler , AB , generally divided into inches and tenths ; near the extremities are

placed two rollers turning on an

**axis**parallel viii INTRODUCTORY SECTION . Side

extremities are placed two rollers turning on an

that the ruler is capable of moving at right angles to the direction of the edge AB .

By the aid of this instrument , any number of lines may be drawn parallel to a ...

extremities are placed two rollers turning on an

**axis**parallel to the edge AB , sothat the ruler is capable of moving at right angles to the direction of the edge AB .

By the aid of this instrument , any number of lines may be drawn parallel to a ...

Side 73

A straight line drawn from the centre of the base to the apex ( or summit ) is called

its

is said to be a right cone . NOTE 3 . — When the

A straight line drawn from the centre of the base to the apex ( or summit ) is called

its

**axis**. Ex . ADNOTE 2 . - When the apex is perpendicular to the base , the coneis said to be a right cone . NOTE 3 . — When the

**axis**is not perpendicular to ... Side 74

Such a figure has two diameters , unequal in length ; viz . , the long diameter A B ,

called the transverse or major

conjugate or minor

Such a figure has two diameters , unequal in length ; viz . , the long diameter A B ,

called the transverse or major

**axis**, and the short diameter ab , called theconjugate or minor

**axis**. NOTE 2 . — There are two important fixed points in the ... Side 75

A hyperbola is a section of a cone , produced by a plane which is parallel to its

CD its abscissa , and CE its diameter . NOTE 2 . — The three foregoing sections ...

A hyperbola is a section of a cone , produced by a plane which is parallel to its

**axis**. Ex . ABCА с NOTE 1 . - - AB is termed its double ordinate , AC its ordinate ,CD its abscissa , and CE its diameter . NOTE 2 . — The three foregoing sections ...

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altitude arc cutting Atlas axis base Bisect the angle called centre circumference cloth complete cone construct contained curve cutting cylinder describe a circle describe an arc describe arcs diagonal diameter distance divide draw a line draw lines Draw the line edge elevation ellipse equal equal in area equilateral triangle face four given circle given line given point given square ABCD given straight line given triangle ABC half height hexagon horizontal plane inches inclined inscribe intersection isosceles triangle Join length Maps mark meeting Method NOTE obtain parallel parallelogram pass pentagon perpendicular Philips plane of projection polygon prism Problem produced projection projectors pyramid radii radius rectangle rectilineal figure regular represent required circle respectively right angles scale semicircle sides similar solid straight line Take touching traces trapezium vertical plane

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Side 295 - Philips' Preparatory Atlas, Containing Sixteen Maps, full colored. Crown quarto, in neat cover, 6d. Philips Preparatory Outline Atlas. Sixteen Maps. Crown quarto, printed on fine cream-wove paper, in neat cover, 6d. Philips Preparatory Atlas of Blank Projections. Sixteen Maps. Crown quarto, printed on fine cream-wove paper, in neat cover, 6d. Philips Elementary Atlas for Young Learners.

Side 294 - Young Student's Atlas, Comprising Thirty-six Maps of the Principal Countries of the World, printed in colors. Edited by W. Hughes, FRGS Imperial 41.0., bound in cloth, 33. 6d. Philips Atlas for Beginners, Comprising Thirty-two Maps of the Principal Countries of the World, constructed from the best authorities, and engraved in the best style. New and enlarged edition, with a valuable Consulting Index, on a new plan.

Side 193 - A cone is a solid figure described by the revolution of a right-angled triangle about one of the sides containing the right angle, which side remains fixed. If the fixed side be equal to the other side containing the right angle, the cone is called a right-angled cone ; if it be less than the other side, an obtuse-angled ; and if greater, an acute-angled cone. XIX. The axis of a cone is the fixed straight line about which the triangle revolves.

Side 123 - A straight line is said to be cut in extreme and mean ratio, when the whole is to the greater segment as the greater segment is to the less.