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The University publishes bulletins four times a month, so numbered that the first two digits of the number show the year of issue, the last two the position in the yearly series. (For example,No. 2201 is the first bulletin of the year 1922.) These comprise the official publications of the University, publications on humanistic and scientific sub-jects,bulletins preparedby the Divisionof Extension,by the Bureau of Economic Geology, and other bulletins of general educational interest. With the exception of special num-bers, anybulletin will be sent to a citizen of Texas free on request. All communications about University publications should be addressed to University Publications,University of Texas, Austin