Panama and the canal in picture and prose .. . WHEEL SHOWN THE BULL WHEEL or withdraws the arm at the right which moves the gate i86 PANAMA AND THE CANAL. THE TANGLED MAZE OF STEEL SKELETONS THAT ARE A LOCK IN THE MAKING in motion twice during each lockage of a singleship, and this number may be increased to 143,dependent upon the previous position of the gates,valves and other devices. Down under the surfaceof the lock wall, packed into a little crypt whichseems barely to afford room for its revolving, is agreat cogwheel 20 feet in diameter, revolving slowlyand operating a ponderous steel
Panama and the canal in picture and prose .. . WHEEL SHOWN THE BULL WHEEL or withdraws the arm at the right which moves the gate i86 PANAMA AND THE CANAL. THE TANGLED MAZE OF STEEL SKELETONS THAT ARE A LOCK IN THE MAKING in motion twice during each lockage of a singleship, and this number may be increased to 143,dependent upon the previous position of the gates,valves and other devices. Down under the surfaceof the lock wall, packed into a little crypt whichseems barely to afford room for its revolving, is agreat cogwheel 20 feet in diameter, revolving slowlyand operating a ponderous steel arm which thrustsout or pulls back the gate as desired. The bullwheel, they call it, is driven by a 27 horse powermotor, while a smaller motor of 73^ horse powerlocks the gates tight after they are once in of these bull wheels, and two each of themotors are needed for each pair of gates. The ship then is in the lowest lock, one pair ofgates closed tightly behind her. Another pair con-fronts her holding back the water in the lock above,which if filled, will be just 283/3 feet above thesurface of that on which she floats. But the waterabout
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Keywords: ., bookauthorabbotwil, bookcentury1900, bookdecade1910, bookyear1913
