The center of pressure of a projectile is caused to move upon the occurrence of an event that changes the static margin, such as the jettisoning of a body previously attached to the projectile, as noted above. A conveyance frame 12 is fed to each of the booths 1-6 using a shuttle feed method, and conveyance of the workpiece W is stopped to perform the coating operation and the like. The photodiode has a first terminal coupled to a voltage source and a second terminal. A portion of the circuit is selected for replication. The selection of a personality type prompts the central processing unit to cause the display to show a list of preprogrammed protocols for biological sample processing that correspond to the selected personality type.