Chicago : [Popular Engineering Pub. Co.] · leaf 75
Y 65 to this engraved plate, accurate to the not be operated at a sufficient speed to meet thousandth part of an inch, and this tool the requirements of an active market. To is used in cutting the grooves in the mold in obtain the best results skilled and progres- which the glass is pressed. sive… … to the services of Mr. Ralph W. Pope, who MOLD FOR PRESSING HOLOPHANE GLOBES has been secretary continuously since the secure high optical quality, is formed up by annual meeting in May, 1885, when the so- a specially constructed press. A thorough ciety was only one year old. This loyal annealing…
Electricity
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