A 19th-Century brass drainage level, the limb signed EMPR DRAINING LEVEL by NEWTON & C. 3 Fleeet S LONDON., the telescope with rack and pinion focusing, cross wire adjustors, raised on the limb by twin column supports with bubble level, the quadrant engraved from ½ins. to 8ins. in the yard, Rise 8-0-8 Fall, on 4 screw tripod mounting, the telescope 14ins. (35.6cm.) long.

細節

A 19th-Century brass drainage level, the limb signed EMPR DRAINING LEVEL by NEWTON & C. 3 Fleeet S LONDON., the telescope with rack and pinion focusing, cross wire adjustors, raised on the limb by twin column supports with bubble level, the quadrant engraved from ½ins. to 8ins. in the yard, Rise 8-0-8 Fall, on 4 screw tripod mounting, the telescope 14ins. (35.6cm.) long.
See illustration