Chapter C: D. F.--The measurement of glasses for "Boy's Telescope" refers to the

focus, not to the size of glass. Any reliable optician will supply you with the lenses.

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AGNES P.--Your answers to puzzles are correct. We do not know the address of Lulu W., but will print it if she will send it to us.

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"LOUISE," Dubuque.--Your account of Sir Rowland Hill is correct, and very neatly written, but as it is almost the same as those we have already printed, we do not give it.

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"MAX."--Your numerical charade is very good, but contains too many repetitions of the same letter to be perfect; therefore we do not print it.

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Answers sent by R. Dunlop Foster, Chicago, to mathematical puzzles are correct, with the exception of No. 2, which is not carried back to the original amount possessed by the poor old man when the water-spirit made his first offer.

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