Summary: THE memoir on the oil-shales of the Lothians published by the Geological Survey of Scotland in 1906 contained so much valuable information that the first edition was exhausted in 1911, and the second edition, brought thoroughly to date, has now been issued, and forms a most welcome and valuable addition to our knowledge at a time when the Scotch shale-oil industry is exciting so much interest as a possible asset to the Empire in the supply of fuel oil.