TY - CHAP DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: Public Domain Mark 1.0 TI - Plate 192: Ballista T2 - Le diverse et artificiose machine del capitano Agostino Ramelli ID - js956g141 AU - Ramelli, Agostino CY - Paris, France DA - 1588/// YR - 1588 UR - https://digital.sciencehistory.org/works/js956g141 AB - Uses tension to launch arrows, pyrotechnic projectiles, balls, and rocks to defend a city or fortress. Mechanics: roller thrust bearing; projectile throwing engine; trigger. KW - Ballista KW - Machinery KW - Engines of war LA - ER -