Since one of the processes used for the manufacture
of potassium bichromate depends upon the double
decomposition of sodium bichromate with potassium
chloride and subsequent crystallisation of the potassium
bichromate formed either spontaneously or by
evaporation, the determination of the phase-rule
equilibria existing in the above system has a certain
THE NATURE OF THE ORGANIC MATTER EXTRACTABLE
FROM COAL BY PYRIDINE. BY J. B. ROBERTSON. JOURNAL
South African Chemical Institute.
VoL. VI. JANUARY, 1923. No. 1.