Book 3 — Homemade Level
Reading edition
A Bottle Filled with Water and Tied to a Straight Piece of Wood for a Level
Having need of a level, and there being no place to obtain one within several miles, I constructed one as follows: A long medicine bottle was filled with water and tied to a straight piece of wood, 2 ft. long. After setting it properly by turning the piece end for end several times, I found that it could be used with accuracy.—Contributed by Fred L. King, Islip, L. I.