The Encyclopedia Americana, Volume 7Grolier Incorporated, 1998 - Encyclopedias and dictionaries |
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Page 145
The importance of coal tar pitches has increased tremendously in recent years because of the growing number of useful chemicals recovered and derived from them . However , the single most important use of coal tar pitch itself in the ...
The importance of coal tar pitches has increased tremendously in recent years because of the growing number of useful chemicals recovered and derived from them . However , the single most important use of coal tar pitch itself in the ...
Page 581
Pine trees are among the most important timber sources . Enormous quantities of various species provide construction lumber . “ Hard ” pine lumber comes from the southern longleaf pine ( P. palustris ) , and " soft " pine lumber is cut ...
Pine trees are among the most important timber sources . Enormous quantities of various species provide construction lumber . “ Hard ” pine lumber comes from the southern longleaf pine ( P. palustris ) , and " soft " pine lumber is cut ...
Page 760
One of the single most important properties of bulk copper is its very high electrical conductivity . This property accounts for the extensive use of copper in the electrical industry . The high electrical conductivity of copper is ...
One of the single most important properties of bulk copper is its very high electrical conductivity . This property accounts for the extensive use of copper in the electrical industry . The high electrical conductivity of copper is ...
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