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1 The resolutions passed by the Congress at Bologna differ from those adopted by the English Committee chiefly in the following particulars — 3. The scale of colours for the Map of Europe is modified as stated above. The colours for Palaeozoic rocks being left undecided for the present. 4a and were not considered. only so far as to define the colours to be used for crystalline schists of Pre-Cambrian or of unknown age.Google Scholar