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Strona 145
Structure Symbols of Organic Compounds . . . Magic Rust Remover . . . . . . . . . . . .
. . . . . . . . . . . . Investigation of Atmospheric Pollution . . . Proceedings and Notices
of Societies — The Royal Society ; The Physical Society . . . Notices of Books .
Structure Symbols of Organic Compounds . . . Magic Rust Remover . . . . . . . . . . . .
. . . . . . . . . . . . Investigation of Atmospheric Pollution . . . Proceedings and Notices
of Societies — The Royal Society ; The Physical Society . . . Notices of Books .
Strona 151
When exposed in the normal atmosphere it takes up 7 - 9 per cent . of moisture .
For certain moulding , acetate materials cannot be used . We are all familiar with
the black ebonite part which holds the nib of the fountain pen and which cannot ...
When exposed in the normal atmosphere it takes up 7 - 9 per cent . of moisture .
For certain moulding , acetate materials cannot be used . We are all familiar with
the black ebonite part which holds the nib of the fountain pen and which cannot ...
Strona 153
INVESTIGATION OF ATMOSPHERIC POLLUTION . REPORT ON
OBSERVATIONS FOR THE YEAR ENDED , 31st March , 1931 . Estimates of the
amount of tar , soot and other impurities deposited from the air during the twelve
months ended ...
INVESTIGATION OF ATMOSPHERIC POLLUTION . REPORT ON
OBSERVATIONS FOR THE YEAR ENDED , 31st March , 1931 . Estimates of the
amount of tar , soot and other impurities deposited from the air during the twelve
months ended ...
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