D. D. Lee.—You will find some useful suggestions concerning catamarans in The Canoe and the Flying Proa, by W. L. Alden, a volume of "Harper's Half-hour Series."
Daisy G.—No article on silk-worms has been published in Harper's Bazar, but there was an interesting paper in Harper's Magazine on that subject, to which reference was made in Post-office Box No. 44.
Alexina N., Carl S. H., Helen R. F., and others.—Write directly to the correspondents with whom you desire to make exchange.
Favors are acknowledged from Fannie W. B., Louie, Frank W., Winnie S. Gibbs, Miriam Hill, G. Y. M., Mary B. Reed, Clyde Marsh, Howard Starrett, Edwin F. Edgett, S. Birdie D., P. T. C., Amelia M. Smith, Helen M. Shearer, Florry and Daisy, Maud Dale, Pearl Collins, Maud Zeamer, Rosa Mary D., May Harvey, George Thomas.
Correct answers to puzzles are received from George D. S., Edward, Maggie Horn, K. T. W., M. E. Norcross, Nena C., Karl Kinkel, Addie Giles, Frank Lomas, Mary E. Fortenbaugh, "Morning Star," Effie K. Talboys, Myra M. Hendley, Charlie Rossmann, Florence E. Iffla, "Chiquot," G. Volckhausen, Ralph M. Fay, H. A. Bent, Daisy Violet Morris.