Copy letter from Francis Alexander Towle, Assistant Secretary and Librarian of the Royal Society; to Dr. J. A. Lautenschlager, Universitats-Bibliothek (Tauschabteilung [Exchange Department]) Heidelberg, Germany Replies by sending a letter sent 31 July 1923 [not enclosed] which mentions that the matter of the Verhandlungen of the Naturh. -med. Verein. States that the Library Committee is yet to situate the exchange and requests the two series (Sitzber. and Abhandl.) of the Math. -nat. Klasse of the Heidelberg Akademie der Wissenschaften, so that the Library Committee may be more likely to agree to send both series of Proceedings in exchange. 14 April 1924