poster, Coupe international de Spheriques, by EL, issued at Le Mans, 1936. Promoting events at a balloon flights meeting in Ville du Mans on Sunday 19 May 1936, including primarily balloon flights by Paulette Weber, Charles Dollfus and others, and presented by Professor Piccard. Text, some in col, printed over montage of balloons, town buildings below. Lithograph, col., 183 x 104 cm. Coupe International de Spheriques 1936
"Arithmograph" of Leon Bollee, with stylus, instructions for use and sets of mathematical tables printed on two cards, together with a tin mask, 2" x 1 3/8" "Arithmograph" of Leon Bollee 1895-1900