The New Encyclopędia Britannica, Volume 16Encyclopędia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 150
Refining involves the removal of impurities from copper metal to yield a product containing less than 110 of 1 percent of impurities . Fire refining . Blister copper contains copper oxide and small quantities of other impurities .
Refining involves the removal of impurities from copper metal to yield a product containing less than 110 of 1 percent of impurities . Fire refining . Blister copper contains copper oxide and small quantities of other impurities .
Page 327
The transition between cipher and code is not too clear , as may be seen from the example shown below of a syllabary square , which contains the 26 letters , 10 digits , and 64 digraphs and trigraphs chosen on the basis both of ...
The transition between cipher and code is not too clear , as may be seen from the example shown below of a syllabary square , which contains the 26 letters , 10 digits , and 64 digraphs and trigraphs chosen on the basis both of ...
Page 1101
The process may be carried out in alcoholic solution . The final product , like all disperse dyes , must be ground to a particle size of 1-10 microns ( 1,000 microns = 1 millimetre ) in an aqueous medium containing a dispersing agent .
The process may be carried out in alcoholic solution . The final product , like all disperse dyes , must be ground to a particle size of 1-10 microns ( 1,000 microns = 1 millimetre ) in an aqueous medium containing a dispersing agent .
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