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Scientific American, Vol. 100, No. 2 (January 1909) (1909)

leaf 5

An illustration from Scientific American, Vol. 100, No. 2 (January 1909), 1909, leaf 5
he small illustration rotating head, from which they are carried away by a every animal is suitable for every investigation. on the right, it will be noticed a stationary sprocket is conveyer leading to the rear end of the machine. While certain are immune to some diseases, to others fixed to the… … drill head 8-feet in diameter. If a full-sized tunnel of A SHUTTEBLESS MOVING PICTURE CAMERA. freedom from injurious organisms, was determined. say 15 or 20 feet diameter were being driven to rock, In fact, this was an important part of a general study this sprocket with the movable ring sprocket…

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