Figure 62. A cross-bow bottle devised by Jean Comelli, instrument-maker of the
Oceanographic Museum at Monaco in 1953. This instrument was built for Jean
Brouardel for studying oxygen content in sea-water. The bottle is plexiglass.
Left: descending. Right: ascending. This instrument was used on the museum's
small vessel the EIDER off Monace in depths of 150 to 500 meters.