n illustrated description of draulic works, which M. De la Blanchere has been The details of the steel and iron work of the bridge a portable photometer, designed and used by him for proper were worked out in England, and the material studying for the last ten years. The main principle measuring… … flourishing period being depth of water in cold the third century of the weather months being Christian era. After that, about 37 ft., and rising dur- civil wars—and, above all, ing the floods to 92 ft., with a velocity of about 20 ft. the wars of religion—led to the decadence and de- per second.…
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