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log glass
INSTRUMENTS - TAFFRAIL LOGS0 x 0 x 0
Log glass, probably American, 5 minutes. One piece elongated globular bottle, blown closed, filled with red sand. Tubular wooden case, disc ends 2" diameter, 4 3/4" long, cut away on 2 sides. Unscrews at one end, other end cracked. Accurate. Ref: Brewington's "Navigating Instruments", p. 79 #228
1957.903