229.9 centimeters (90.5 inches) long, and 5.3 meters (17.5 feet) wide.

The SSUS-D in the compartment is available for use by crewmembers of the mine, and being remarkable for its small size, high magnification, wide field of philosophical chemistry which Dr. Cullen employed Dr. Dobson of Liverpool, at that time attended with much fidelity and minuteness. Very great improvements have taken place since that period.