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

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Page 271

911. Prop . XXXV . To find the centre of a

required to find the centre be AGBF . Draw any chord AB ( fig . 267. ) ; bisect it ,

and from the point of division D raise a perpendicular FG : this line will pass

through the ...

911. Prop . XXXV . To find the centre of a

**circle**. Let the**circle**of which it isrequired to find the centre be AGBF . Draw any chord AB ( fig . 267. ) ; bisect it ,

and from the point of division D raise a perpendicular FG : this line will pass

through the ...

Page 292

and D will be the centre of the

equilateral triangle in a given

( fig . 378. ) ; from the point B as a centre , with the radius BC of the given

describe ...

and D will be the centre of the

**circle**. 1015. PROB . XIX . To inscribe anequilateral triangle in a given

**circle**. Through the centre C draw any diameter AB( fig . 378. ) ; from the point B as a centre , with the radius BC of the given

**circle**,describe ...

Page 331

PROBLEM VII . To find the diameter and circumference of any

the other . Rule 1. As 7 is to 22 , or as 1 is to 3 • 1416 , so is the diameter to the

circumference . Or as 22 is to 7 , so is the circumference to the diameter .

Example .

PROBLEM VII . To find the diameter and circumference of any

**circle**, either fromthe other . Rule 1. As 7 is to 22 , or as 1 is to 3 • 1416 , so is the diameter to the

circumference . Or as 22 is to 7 , so is the circumference to the diameter .

Example .

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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