Fireside Science a Series of Popular Scientific Essays Upon Subjects Connected
Fireside Science a Series of Popular Scientific Essays Upon Subjects Connected
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In our eReader you can find the full English version of the book. Read Fireside Science a Series of Popular Scientific Essays Upon Subjects Connected Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Fireside Science a Series of Popular Scientific Essays Upon Subjects Connected
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This we have already described. The gem is adjusted in soft lead heaped conically in a copper cup, ten times the capacity of those used upon the cement sticks in cutting. The surface of the wheel is charged with diamond dust mixed with oil to the consistency of thin paste. The stone and wheel thus arranged, the latter is made to revolve at the rate of fifteen hundred revolutions a minute, and the stone, placed in a heavy iron clamp, is in- verted upon the wheel. Nothing but the diamond touches ...the wheel, it being pressed down by the weight of the iron clamp. A rather musical tone is produced by the contact, which shows that the wheel is doing its work, and that now a bright sur- face will be produced upon the " table " exposed to its action. When this is satisfactory, the operator melts the lead, releases the gem, and readjusts it so as to polish another of the faces, and in this way the process goes on until the work is completed. To attain this, however, the tables and faces are many times exposed to the wheel, and it is not until the most careful measurements and experiments are made that the gem is pronounced satisfactory.
What to read after Fireside Science a Series of Popular Scientific Essays Upon Subjects Connected?
You can find similar books in the "Read Also" column, or choose other free books by James R James Robinson Nichols to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This we have already described. The gem is adjusted in soft lead heaped conically in a copper cup, ten times the capacity of those used upon the cement sticks in cutting. The surface of the wheel is charged with diamond dust mixed with oil to the consistency of thin paste. The stone and wheel thus arranged, the latter is made to revolve at the rate of fifteen hundred revolutions a minute, and the stone, placed in a heavy iron clamp, is in- verted upon the wheel. Nothing but the diamond touches ...the wheel, it being pressed down by the weight of the iron clamp. A rather musical tone is produced by the contact, which shows that the wheel is doing its work, and that now a bright sur- face will be produced upon the " table " exposed to its action. When this is satisfactory, the operator melts the lead, releases the gem, and readjusts it so as to polish another of the faces, and in this way the process goes on until the work is completed. To attain this, however, the tables and faces are many times exposed to the wheel, and it is not until the most careful measurements and experiments are made that the gem is pronounced satisfactory.
What to read after Fireside Science a Series of Popular Scientific Essays Upon Subjects Connected?
You can find similar books in the "Read Also" column, or choose other free books by James R James Robinson Nichols to read onlineMoreLess
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