## The Encyclopedia of Architecture, Historical, Theoretical, and Practical |

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Page 283

L B B F B M M L CM AU JDG B If two right lines LM , FG be drawn , in these two

perpendi . cular to the

the lines ...

L B B F B M M L CM AU JDG B If two right lines LM , FG be drawn , in these two

**planes**, perpendicular to the line AB ... but**plane**: and the line A B will beperpendi . cular to the

**plane**MLGFPN , because it will make right angles B withthe lines ...

Page 284

make right angles with the lines AC , AD , it will be perpendicular 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 perpendicular 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 312

Let P be the point of concourse of the three

be the point of concourse of the three

the

...

Let P be the point of concourse of the three

**planes**QVN , KML , AHI , and Jet Hbe the point of concourse of the three

**planes**QVN , KML , AHI ; then , becausethe

**planes**VRX and ADI are parallel , and the**plane**VQN is perpendicular to the...

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