## An Encyclopaedia of Architecture, Historical, Theoretical, & Practical |

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Page 284

applied to it touch it in two points it will touch it in every other point . The surface

of a fluid at rest , or of a well - polished table , may be considered as a

right ...

**PLANES**. 969. Definitions . - 1. A**plane**is a surface , such that if a right lineapplied to it touch it in two points it will touch it in every other point . The surface

of a fluid at rest , or of a well - polished table , may be considered as a

**plane**. 2. Aright ...

Page 285

JDIG If two right lines LM , FG be drawn , in these two

the line AB , these will form four angles at ... will describe in the revolution a

surface which will be neither concave nor convex , but

be ...

JDIG If two right lines LM , FG be drawn , in these two

**planes**, perpendicular tothe line AB , these will form four angles at ... will describe in the revolution a

surface which will be neither concave nor convex , but

**plane**: and the line AB willbe ...

Page 286

make right angles with the lines AC , AD , it will be perpei dicular to the

which passes through these lines . If the line A B were not perpendicular to the

FDCG , another

AB ...

make right angles with the lines AC , AD , it will be perpei dicular to the

**plane**which passes through these lines . If the line A B were not perpendicular to the

FDCG , another

**plane**might be made to pass through the point A , to which theAB ...

Page 287

A polyhedron is a solid terminated by

terminated by two identica

which are parallelo . grams . ( Fig . 394. ) 4. A parallelopiped is a prism the bases

of ...

A polyhedron is a solid terminated by

**plane**surfaces . 3. A prism is a solidterminated by two identica

**plane**bases parallel to each other , and by surfaceswhich are parallelo . grams . ( Fig . 394. ) 4. A parallelopiped is a prism the bases

of ...

Page 289

Because the

CD , will also ( Prop . 98. ) be perpendicular to the

Abc , ABC , having the angles b , B right angles , and the angle A common , are ...

Because the

**planes**cd CD are parallel ; AB , being perpendicular to the**plane**CD , will also ( Prop . 98. ) be perpendicular to the

**plane**od : Thence the trianglesAbc , ABC , having the angles b , B right angles , and the angle A common , are ...

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angle appears arch architect architecture base beam becomes bricks building built called carried cast cathedral cement centre century church circle colour columns common considered construction contains course covered curve describe diameter direction divided draw effect employed equal erected examples face feet foot force four front give given greater ground half height horizontal inches iron Italy joints length less lime marble material means mouldings nearly necessary observed obtained ornaments parallel period perpendicular placed plane portion produced Prop proportion quarries radius remains respect Roman roof says side similar solid square stone strength style supposed surface temple thickness timber tons tower triangle upper usually vault vertical walls whole wood