## Elementary Mechanical Drawing, for School and Shop |

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### Common terms and phrases

2.—Draw the plan 2.—Make a constructive 4.—Describe 4.—Develop the surface 9 ft angle of 30 angle of 45 angular elevation arcs of equal base circumference completely described concentric circles cone constructive drawing curved cylinder describe arcs developed surface diame diameter dimensions division points draw a line draw leaders Draw the plan eaves eleva ellipse end elevation equal in length externally tangent find the elevation foot frustum gable roof given line given point ground plan helical band helix hemisphere horizontal lines inch inclined surface Join left-hand edge length and breadth line perpendicular longer sides middle number of degrees number of equal parallel elevations pierced pitch plan and angular plan and elevation plan and parallel plan draw plane Prob Protractor pyramid radius rectangular required triangle right-hand end scribe Section side elevation slant height Solution.—Draw the plan sphere square T-square tangent circles thick thread screw tion vation wall wide winders window

### Popular passages

Page 15 - An angle is the space included between two lines, which meet each other. Circle. A circle is a regular figure, bounded by a curve line, every part of which is equally distant from a point within it, called the centre. The circumference of a circle is the curve line, which bounds it. The radius of a circle is a straight line...

Page 39 - ... the sum of the distances of any point on the curve from two fixed points is constant, he would never have been known as " the Legislator \ \ of the Heavens.

Page 24 - When the distance between their centers is greater than the sum of their radii, there can be neither contact nor intersection.

Page 98 - In a dispatch dated January 24, 1896, Consul Ridgely, of Geneva, says: It may be interesting to American watchmakers to know that the latest invention of the watchmakers of Switzerland is a watch whose hands move from right to left instead of from left to right, as in ordinary watches. This unique invention is designed for the markets of Turkey, Japan, and other Oriental countries, where the natives read from right to left, and where, I am informed, there has been a demand for watches of this character.

Page 25 - THEOREM . 192. If two circumferences cut each other, the straight line passing through their centers will bisect at right angles the chord which joins the points of intersection. Let two circumferences cut each other at the points A and B ; then the straight line passing through...

Page 107 - EMF in volts generated by the alternator is represented by the hypothenuse of a rightangled triangle, of which the other two sides...

Page 39 - These parallels will divide the given line into the required number of equal parts.

Page 33 - To Draw a Line Perpendicular to a Given Line from a Point on the Line, or Outside the Line.

Page 35 - TANGENT LINES. A line is tangent to a circle, when it touches it ; ex.

Page 116 - Step: draw a horizontal line extending from the center line of the circle, the length of which is equal to the circumference of the circle.