Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 4046437 | Combination cabinet for audio-visual teaching A combination cabinet for audio-visual teaching comprises a projection screen which is mounted for pivoting into an operational position in which it receives by rear projection an image from a projector after reflection of the image light rays by a mirror... | 09/06/1977 |
