Printed on cardboard tube: "EMBRYON"; in script: "Silkworm"; on label surrounding glass vial: "50 Specially Selected // PREPARED SILK WORM GUT // STERILIZED AND PRESERVED IN ALCOHOL // To facilitate tying, place them in a hot // bichloride towel just before the // operation. // [two hearts] // PREPARED EXCLUSIVELY BY // THE J.F. HARTZ CO. LIMITED, TORONTO"; "ALPHA 2"