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

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Page 306

The ellipsis is of so frequent occurrence in architectural works , that an

acquaintance with all the properties of the

is of great importance to the architect . Excepting the circle , which may be called

an ...

The ellipsis is of so frequent occurrence in architectural works , that an

acquaintance with all the properties of the

**curve**, and the modes of describing it ,is of great importance to the architect . Excepting the circle , which may be called

an ...

Page 314

A line parallel to the axis , intercepted by a double ordinate and a tangent at the

vertex of that ordinate , will be divided by the

itself divides the double ordinate . Let QM ( fig . 451. ) be the double ordinate , MT

...

A line parallel to the axis , intercepted by a double ordinate and a tangent at the

vertex of that ordinate , will be divided by the

**curve**in the same ratio us the lineitself divides the double ordinate . Let QM ( fig . 451. ) be the double ordinate , MT

...

Page 315

The uses of the parabolic

is the

diffused over its length , and that therefore it should be included in the depth of

lintels ...

The uses of the parabolic

**curve**in architecture are many . The theorists say that itis the

**curve**of equilibrium for an arch which has to sustain a load uniformlydiffused over its length , and that therefore it should be included in the depth of

lintels ...

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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 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