NOTE.—The State rate books, and the National electric rate book which consists of 48 separate State rate books, are issued in loose-leaf form in binder. Supplementary sheets are issued in processed form to replace superseded sheets. Subscriptions for the National electric rate book and State rate books should be made to the Federal Power Commission, Washington, D. C. Prices are as follows: National electric rate book, $15.00 including supplements for 12 months from date of order. State rate books, $1.00, $1.50, or $2.00 (priced according to size) with supplements for 12 months from date of order. See also previous Monthly catalogs.