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7/25 7/20 SATURDAY 26 JULY St. Anne 1969 207th day - 158 days to come


Went to Library Annex on 43rd St. and looked at the two patents I mentioned in my book. No. 729,489 (May 1903) by F.A. Cigol is just a set of dominos done in 2 plys, the back ply being an ink erasor.

[diagram of 4 x 3 grid, letters reading: 1st row: D, E, A, R; 2nd row: A, M, E, R; 3rd row: I, C, A, (blank)]

No. 1,274,294 (July 1918) by Frederick Lobl is a sliding block puzzle as shown, the pieces being edible. Their is a hole in each so that they don't have to be handled, a stick be- ing provided to move them. Also looked thru the first 4 months of 1937 and found a number of patents to order.

At McGraw-Hill Book Store bought GAMES FOR SECOND LANGUAGE LEARNING by Gertrude Nye Dorry. On 8th Ave bought the June 1969 Scientific American. In Macy's bought an extra copy of KRYPTO, marked down to $1. Didn't see anything new at Macy's, Woolworth's or Gimbel's.

Called Martin Gardner to tell him about the sliding block puzzle and discussed whether, with the duplication of letters, it could always be solved. (Yes.) He would still like the patent. I said I was sending for others and would get this one for him. He argued, but finally gave in. I told him about Fabio flipping over his statement on A GAMUT OF GAMES and he said he received a thank you letter. Discussed Schaaf and his bibliography. There have already been three editions and the upcoming will be the fourth. Martin has the previous ones and there is no section for books on competative games. We discussed my sending him some further books of this type, such as Bob Abbott's, Bell's second volume, and suggesting a separ- ate classification including mine & Murray's, Martin also thought he might be interested in the Culin reprint. The Bibliography is obtainable from {The National Council of Teachers of Mathematics 1201 Sixteenth Street, N.W. Washington, D.C. 20036 Martin also said that they publish a magazine called MATHEMATICS TEACHER and he thinks I ought to suggest to the editor that he advertise there. He also suggested havings parts of the book published in a magazine prior to publication of the book. Possible

Rcd. the 3M check, the whole amount. I'll have to write to Will Erickson again. (cont. on 7/25)