## A Manual of Mechanical Drawing |

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### Common terms and phrases

angle angle draw Area arms axis base bolt BRASS called CAST IRON centre and radius centre line circle Circum circumference compass complete cone corners crank cube curve cutting cylinder describe DETAILS developed Diam diameter dimensions direction distance divide dotted draughtsman draw a circle draw arcs draw lines drawn ellipse employed ENGINE equal face ference figure FINISHED follows foot front give given half hand head height hexagon inches indefinitely indicated intersection joint length lesson light mark measured method necessary object parallel perpendicular piece placed plane PLATE points prism produce representing right angles rolled round scale screw semi-circle shade shaft sheet short shown side elevation space spiral square STEEL straight line surface sweep tangent thickness thread triangle vertical wheel width

### Popular passages

Page 3 - The base of a triangle is the side upon which it is supposed to stand.

Page 2 - A Plane Surface, or a Plane, is a surface in which, if any two points be taken, the straight line joining these points will lie wholly in the surface.

Page 4 - A Polygon of three sides is called a triangle ; one of four sides, a quadrilateral; one of five sides, a pentagon; one of six sides, a hexagon; one of seven sides, a heptagon; one of eight sides, an octagon ; one of ten sides, a decagon ; one of twelve sides, a dodecagon, &c.

Page 5 - A Polygon is circumscribed about a circle when all of its sides are tangent to the circle, and a circle is circumscribed about a polygon when the circumference passes through all the vertices of the polygon.

Page 2 - A Right Angle is an angle included between two straight lines which meet each other so that the two adjacent angles formed by producing one of the lines through the vertex are equal. Thus if the straight line AB meet the straight line С D...

Page 5 - Two Circumferences are tangent to each other when they are tangent to a straight line at the same point.

Page 4 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.

Page 4 - A Circle is a plain figure bounded by a curved line called the Circumference, all points of which are equally distant from a point within called the Centre.

Page 56 - ... of any point in the curve from the focus is to its distance from the directrix, as the distance between the foci is to the axis major ; and secondly, that the difference of the distances of any point in the curve from the two foci is equal to the axis major. 3. " On the diurnal Temperature of the Earth's surface, with the discussion of a simple formula for ascertaining the same.

Page 6 - To divide a given finite straight line into any number of equal parts. Let AB be the given straight line.