Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 5302052 | Underground work chamber assembly and method for the construction thereof An underground work chamber assembly including a chamber, elevator shaft, air path, utility path, and slotted grout pipes which is assembled as lowered into a drilled hole on dry land or underwater, the slotted grout pipes facilitating a controlled grouti... | 04/12/1994 |
