
TechnologyOctober 1, 1926
Huge Job of Solid Rock Excavation
How Engineers Drilled and Blasted Through 50 Feet of Manhattan Rock to Reach a Firm Foundation for a 45-story Building

Huge Job of Solid Rock Excavation
How Engineers Drilled and Blasted Through 50 Feet of Manhattan Rock to Reach a Firm Foundation for a 45-story Building

Diving Through Mud to Rock

Engineering in the Great European War
Former Tactics and Strategy have become Subordinate Factors