Lynde, Carleton John, b. 1872, Gilbert, A. C. (Alfred Carlton), 1884-1961, A.C. Gilbert Company · New Haven, CT : A.C. Gilbert Co. · leaf 40
with ink,and make marks 2 inches fromthe center on each side. Hold the tube crosswise inthe lamp flame, heat at onemark, draw down the tube andclose it (2). In a similar manner drawdown the tube at the othermark but do not close it (3). Let the tube cool and fill itwith alcohol to the level shownin… … FIG. 65MAKTNG A SPIRIT LEVEL GLASS BLOWING 39 ^v^sgigr FIG. 66MOUNTING THE SPIRIT LEVEL / Z Heat the small partof 4, without heatingthe alcohol, and closethe tube (6). Nowattach the level to asmooth board as 2 or3, Fig. 66, mark thecenter of the bubble,and your spirit level isready for…
Glass blowing and working
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