Mr. Andrew Carnegie, who has always taken profound interests in the cultivation friendly and pacific relations with the South American Republics and who member of the Pan-American Congress which met several years ago in Washington, during the sessions of that Congress sat next to Dr. Roque Saenz Pena, who recently has been inaugurated as President of the Argentine Republic a wonderful museum -- The Museo de la Plata -- which contains the largest collection of South American fossil remains in existence. Not long ago President Pena wrote to Mr. Carnegie, addressing him as his dear colleague, asking him to present to the National Museum a replica of the Diplodocus similar to the one which has been presented by Mr. Carnegie to the Kings of England and Italy, the President of the French Republic, and the Emperors of Austria, Germany, and Russia. Mr. Carnegie, with his characteristic generosity, promptly complied with the request, and has given instructions to the Director of the Carnegie Museum to have such a replica prepared. The bones have been cast, but they have not yet been fitted together and assembled. This is a process which consumes a good deal of time, as the whole skeleton is supported upon a framework of steel every portion of which has to be made with great accuracy and adjusted to the bones so that when the skeleton is sent to the museum where it is intended to be set up as little time as possible will be required in effecting a resotration.