THE appearance of a new part (No. 20) of Geological Literature added to the Geological Society's Library in 1913 will be welcomed by all who are actively engaged in geological work. In the interests of research it is to be hoped that the issue of the records for 1914 and subsequent years will not be long delayed, as this publication is of the greatest possible value, in fact one might almost say indispensable to all who desire to keep up with the current developments of their particular branch of the subject. Our thanks are due to the anonymous compiler of this part; only those who have had experience in bibliographical work can form any idea of the amount of time and trouble which its preparation must have involved.