 This done, press the protractor gently down, which will fix it in position by means of very fine points on the under side. It is now ready to lay off the given angle, or any number of angles that may be required, which is done by turning the pinion d...  APPLETONS' CYCLOPAEDIA OF DRAWING - Seite 33von W.E. WORTHEN - 1857Vollansicht - Über dieses Buch
 | Frederick Walter Simms - 1845 - 184 Seiten
...will fix it in position by means of very fine points on the under side. It is now ready to lay off the given angle, or any number of angles that may be required,...number of angles may be laid off from the same point. As described for the last instrument, it is not essential that the centre be over the given point,... | |
 | John F. Heather - 1849 - 208 Seiten
...will fix it in position by means of very fine points on the under side. It is now ready to lay off the given angle, or any number of angles that may be required,...setting 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... | |
 | Thomas Baker - 1850 - 244 Seiten
...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 Seiten
...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...setting of the instrument, a great number of angles, or a complete circular protractor, may be laid off from the same point. TIIE CIRCULAR " TALC" PROTRACTOR.... | |
 | William Ezra Worthen - 1857 - 632 Seiten
...will fix it in position by means of very fine points on the under side. It is now ready to lay off the given angle, or any number of angles that may be required,...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... | |
 | John Fry Heather - 1859 - 198 Seiten
...will fix it in position by means of very fine points on the under side. It is now ready to lay off the given angle, or any number of angles that may be required,...setting of the instrument, a great number of angles, or a complete circular protractor, may be laid off from the same point. THE T SQUARE AND SEMICIRCULAR... | |
 | Samuel H. Brooks - 1860 - 262 Seiten
...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...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 centre be over... | |
 | William Johnson - 1860 - 442 Seiten
...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 - 1866 - 228 Seiten
...will fix it in position by means of very fine points on the under side. It is now ready to lay off the given angle, or any number of angles that may be required,...setting of the instrument, a great number of angles, or a complete circular protractor, may be laid off from the same point. THE T SQUARE AND SEMICIRCULAR... | |
 | John Fry Heather - 1871 - 236 Seiten
...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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