# Book:Alfred E. Holbrow/Geometrical Drawing/Twelfth Edition

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## Alfred E. Holbrow:

## Alfred E. Holbrow: *Geometrical Drawing and its Practical Applications (12th Edition)*

Published $\text {1944}$, **George Gill & Sons, Ltd.**.

### Subject Matter

### Contents

- Preface

- Preface -- Second Edition

**PLANE GEOMETRY**

- Section $\text {I}$. --
**Introduction**.- Units of Measurement, Measuring Equipment, Use of a Line and Pins, Drawing and Drawing Material.

- Section $\text {I}$. --

- Section $\text {II}$. --
**Lines and Angles**- Definitions, Simple Problems with Practical Applications Measuring obstructed lines in the field, Perpendiculars and Parallels, Use of Set Squares and Protractors, Angle Measuring in the open, Prismatic Compass, Out-door Records.

- Section $\text {II}$. --

- Section $\text {III}$. --
**Division of Lines, and Construction of Scales**- Simple Problems in the Division of Lines, Construction of Scales, Diagonal Scales, Scale of Chords, Proportional Division of Lines, Graphic Determination of Proportional Parts.

- Section $\text {III}$. --

- Section $\text {IV}$. --
**Triangles**- Definitions, Necessary Data, Applications to Out-door Measuring, Use of the Plane Table, The Theodolite, Measurement of Inaccessible Objects and determination of Heights.

- Section $\text {IV}$. --

- Section $\text {V}$. --
**Quadrilaterals**- Simple and Practical Problems of the Square, Rectangle, Rhombus, Rhomboid, etc., Measuring and Plotting Regular and Irregular Quadrilaterals, Applications to Field Work.

- Section $\text {V}$. --

- Section $\text {VI}$. --
**Polygons**- General Constructions, Particular Methods of setting out applicable to Certain Figures, Measurement of Regular Polygons, the Recording of Dimensions, Correction of Error.

- Section $\text {VI}$. --

- Section $\text {VII}$. --
**Areas**- The Area of Plane Figures, Construction of Figures of Required Area, Division of Areas, Areas of Measured Ground.

- Section $\text {VII}$. --

- Section $\text {VIII}$. --
**Circles and Lines**- Definitions, Building up Curves, the Circle and Line, Draughtsmanship, Circles in Contact, Field Work and Examples.

- Section $\text {VIII}$. --

- Section $\text {IX}$. --
**The Ellipse**- Deduction, Definitions and Properties, Methods of setting out on paper and practically. Use of the Trammel, Line and Pins.

- Section $\text {IX}$. --

- Section $\text {X}$. --
**Inscribed and Circumscribing Figures**- Utilising the Problems of the previous Sections, with Applications to Inscribed and Circumscribed Triangles, Squares, Polygons, Circles and Semi-Circles. Application to Ornamental Work and Draughtsmanship.

- Section $\text {X}$. --

- Section $\text {XI}$. --
**Copying, Enlarging and Reducing**- The Application of Geometrical Principles to the Copying, Enlarging and Reducing of given figures, Copying from Dimensioned Diagrams, Use of Squares in enlarging or reducing.

- Section $\text {XI}$. --

- Section $\text {XII}$. --
**Geometrical Ornament**- The application of the Triangle, Square, Polygon etc., to Network, Borders, Diaper patterns; Interlaced Borders, Filling Enclosed Areas, Sub-division of Rectangles, Circles; Construction of Arch Outlines.

- Section $\text {XII}$. --

**SOLID GEOMETRY**

- Section $\text {XIII}$. --
**Solids and Simple Projection**- Geometrical Solids, their appearance, properties and general features; Construction of Models in Paper, Card and Wood; Principles of Projection, Plans and Elevations.

- Section $\text {XIII}$. --

- Section $\text {XIV}$. --
**Auxiliary Views and Sections**- Projection of Geometrical Solids and other objects in more difficult positions, Sections of Solids and the Development of the Surfaces.

- Section $\text {XIV}$. --

- Section $\text {XV}$. --
**Pictorial Projection**- Types of Pictorial Projection, Oblique Projection, Objects in Isometric Projection.

- Section $\text {XV}$. --

- Section $\text {XVI}$. --
**Workshop Drawings**- Dimensioned Scale Drawings of the equipment illustrated in the earlier sections, Wood Models, Drawing Board, Tee and Set Squares, Plane Table and Tripod, Prismatic Compass, A Model Theodolite.

- Section $\text {XVI}$. --

- Section $\text {XVII}$. --
**Points, Lines and Planes**- An Introduction to the Projection of Points, Lines and Planes. Determination of Inclination, True Length, Explanatory Models, Planes in various positions, Intersecting Planes.

- Section $\text {XVII}$. --

## Further Editions

## Source work progress

- 1944: Alfred E. Holbrow:
*Geometrical Drawing*(12th ed.) ... (previous) ... (next): Section $\text I$. Introduction