Fujichrome Sensia 100, OM-2S, 21mm lens, B-setting at f/3.5, 1 GE Mazda 75 flashbulb, 2 Press 22 flashbulbs, tripod.
"Here a single explorer detonates a GE Mazda 75 flashbulb. The immensity of this chamber can be appreciated by noting the small size of the cavers silhouette."
Second Chamber - Rotunda Room
Length - 458ft
Width - 381ft
Height - 66ft