of study and comparisons which involve their CONSTRUCTING LINEAR SCALES, removal, reference can be made to the examination of clock in its laboratory, which is in- stalled in a vacuum case, and is provided with a pendulum of invar, whose coefficient of expansion at or- dinary temperatures is so… … is to keep the wood at:a high temperature in closed respond now to 100 feet 3 vessels (about 250 deg. C.) and at the same time at a inches, and tapes divided high pressure, some 250 pounds per square inch. This the two standards in 1904, previous to sending one to on such a basis are actually made…
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