Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 327
Lealand of great value. A strong brass plateforms its base, and a lever arm carrying the cover-glass of thecompressor is raised and lowered witli a tine screw. The cover-glassmay be cemented on to two or three separate fronts which screwon,^and may carry cover-glass of different thicknesses. The… … Fig. 259.—Professor Delay s parallel compressor. the ordinary size slips in, and is clamped by a spring on the base,and upon this the cover-glass is brought down in compression.An object the 5000th of an inch in thickness can be readilyheld and compressed by its means, but the fronts must beturned…
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