SCIENTIFIC AMERICAN - ORIGINAL, 3 PAGES WITH STORY & 8 PRINTS - "BUILDING THE HUGE CONCRETE LOCKS AT GATUN PANAMA" - APRIL 2, 1910
PIX OF VARIOUS SIZES SHOW: 1. DRAWING OF PLAN AND SECTIONS OF GATUN LOCKS. - 2. AN 18-FOOT CONDUIT FOR EMPTYING AND FILLING THE LOCKS. - 3. GENERAL VIEW OF MIDDLE LOCK. - 4. BUILDING THE HUGE CONCRETE LOCKS AT GATUN, PANAMA. - 5. STEEL FORMS IN PLACE FOR BUILDING CENTER WALL. - 6. A COMPLETED SECTION OF SIDE WALL. - 7. PORTION OF CONCRETE CORE WALL, MIRAFLORES DAM. - 8. SECTIONS OF EASTERLY SIDE WALL, UPPER LOCK.
