A logging while drilling and wire line system for analyzing the concentration of carbon dioxide or another substance, in a sample down hole in a bore hole. The attachment system typically includes a first member having a first attachment surface and a second member having a second attachment surface. The data side of the optical disc is divided into at least one compensation area. The centrifugal weight system is operably connected to the motor so as to pivot centrifugally outward relative to the longitudinal axis in response to the rotation of the motor, moving the movable sheave closer to or further from the stationary sheave. The plate elements support bottom surfaces of the logs and substantially prevent such bottom surfaces from moving downward. After measuring the payload weight, the dump body is returned to its travel position for transport.