Finch, James Kip, 1883- · New York : John Wiley & Sons, Inc. · leaf 139
Fig. 65.—Spirit Leveling. is used. Several forms of clinometers have been devised bymeans of which the vertical angle can be quite accuratelyand rapidly measured, but the slope board is the simplestdevice available and though clumsy is quite as accurate asmost clinometers. The slope board is shown… … Fig. 66.—Method of Using Slope Board. sketch case equipment in Fig. 55. It is also illustrated inFig. 66, which shows the method of holding the board in theleft hand while the plumb line is steadied by the right hand,the vertical angle being read on the scale at the lower edgeof the board.…
Cartography · Military maps
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
