Ernest Hallen
1907, 19 September
19-B Explosion in Progress - Bas Obispo Cut - September 19th, 1907. 4 Holes - 78 ft. Deep - 9600 lbs. Black Powder - 29,640 cu. yds. Displaced.

Gelatin silver print
George A. Smathers Libraries, University of Florida
Panama Canal Museum Collection, Resource Identifier: accession number - 2003.017.015.007, System ID: PCMI008056:00001
 
All applicable rights reserved by the source institution and holding location.
 
LL/57999