Scientific amusements & experiments : interesting & amusing experiments, illusions & clever conjuring tricks easily performed with directions for making inexpensively the necessary apparatus when it is required / by Charles R. Gibson. Gibson, Charles R. (Charles Robert), 1870-1931. Scientific recreations. Q164 .G5 507.2 GIS Includes index. Philadelphia : Lippincott, 1926. 1926. 1926 Text 215 p. : eng