Wednesday April 8 - 1914 Left New Haven at 8 A.M. for New York. Called on Poats and then on Wiley & Sons to see about my plates for Historical Geology. They advised me to make them in ink drawings and then reproduce by the copper line method. Poats he could not reproduce the plates under $15 each and that the copper etching will cost about 12¢ for square inch mine. As I can have them made for from $4 to $5 the ink drawing are much the cheaper. The drawings should be of one size if possible but plates can be built up in the film from different reductions. As regard to numbers all I need do is to indicate them in pencil and they will etch on the required size of printed number.