Page 12, ‘contined’ changed to ‘continued,’ “continued exposure to the”
Page 28, comma changed to full stop, “associated with beds of coal.”
Page 34, ‘or’ changed to upright, “superficial or aqueous agencies”
Page 96, all instances of ‘per cent’ changed to ‘per cent.’: “60 per cent.”, “30 per cent.”, “85 per cent.”
Page 97, full stop inserted after ‘crust,’ “of the earth’s crust. The name”
Page 105, specimen number absent in original.
Page 106, ‘green sand’ changed to ‘greensand,’ “greensand, and serpentine”
Page 107, ‘magnesion’ changed to ‘magnesian,’ “the entire rock is magnesian,”
Page 108, ‘70’ changed to ‘69,’ “classification on page 69”
Page 114, full stop inserted after ‘rocks,’ “the stratified rocks. Like”