| Frederick Walter Simms - 1845 - 184 pages
...line (from whence other and angular lines are to be drawn), and the centre of the instrument coincides with the given angular point on such line. This done,...setting of the instrument, a great number of angles may be laid off from the same point. As described for the last instrument, it is not essential that... | |
| John F. Heather - 1849 - 208 pages
...(or the division marked 360) on the divided limb, and then placed on the paper, so that the two fine steel points may be on the given line (from whence...of the instrument, a great number of angles, or a complSte circular protractor, may be laid off from the same point. THE T SQUARE AND SEMICIRCULAR PROTKACTOR.... | |
| Thomas Baker - 1850 - 244 pages
...vernier reads the required angle. Then press the branches ee gently down, and they will cause their points to make punctures in the paper, at opposite...In this manner, at one setting of the instrument, any proposed number of angles may be laid off from the same point. PLANNING EXTENSIVE SURVEYS, IMPROVED... | |
| Sir Henry Edward Landor Thuillier - 1851 - 826 pages
...pinion d till the opposite vernier reads the required angle. Then press downwards the branches e, e which will cause the points to make punctures in the...circular protractor, may be laid off from the same point. TIIE CIRCULAR " TALC" PROTRACTOR. A VERY serviceable protractor can be made in the following manner,... | |
| William Ezra Worthen - 1857 - 650 pages
...line (from whence other and angular lines are to be drawn), and the centre of the instrument coincides with the given angular point on such line. This done,...setting of the instrument, a great number of angles may be laid off from the same point. It is not essential that the centre be over the given point, when... | |
| William Ezra Worthen - 1857 - 632 pages
...line (from whence other and angular lines are to be drawn), and the centre of the instrument coincides with the given angular point on such line. This done,...instrument was first correctly set. In this manner, at one Betting of the instrument, a great number of angles may be laid off from the same point. It is not... | |
| W.E. WORTHEN - 1857 - 600 pages
...vernier should first be set to zero (or the division marked 360) on the divided limb, and then Fig. 76. given angle, or any number of angles that may be required,...setting of the instrument, a great number of angles may be laid off from the same point. It is not essential that the centre be over the given point, when... | |
| Samuel H. Brooks - 1860 - 262 pages
...angle. Then press down the branches, which will cause the points to make punctures in the paper on opposite sides of the circle; which being afterwards...setting of the instrument a great number of angles may be laid from the same point. As described for the last instrument, it is not essential that the... | |
| William Johnson - 1860 - 434 pages
...will cause the points to make punctures in the papcr at opposites sides of the circle. These points being afterwards connected, the line will pass through the given angular point, if the instrument was correctly adjusted at the outset. In this way at one setting of the instrument a great number of angles... | |
| John Fry Heather - 1871 - 236 pages
...till the forward vernier reads the required angle. Then press lightly downwards the branches o, D•, which will cause the points to make punctures in the paper at opposite sides of the circle ; and the line joining these punctures will pass through the given angular point, if the instrument... | |
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