. American engineer and railroad journal . MEASURING DEPTH AND VELOCITY OF THE IRTISH RIVER IN SIBERIA. slowly sinking the hydrometric apparatus from the water-level to the bottom or inversely lallowing three seconds ormore for each foot of depth), and calculating the velocitycorresponding to the total number of revolutions dividedby the depth. THE MEASUREMENT OF VELOCITIES. As above said, the most suitable apparatus for measur-ing the velocities of current at different depths are the A J , / ^ a \ --/-- -sm^- - i- - - •a hydrometric apparatus—Moiilinct, Fliigcl—of Woltmann,or of Baumgart
. American engineer and railroad journal . MEASURING DEPTH AND VELOCITY OF THE IRTISH RIVER IN SIBERIA. slowly sinking the hydrometric apparatus from the water-level to the bottom or inversely lallowing three seconds ormore for each foot of depth), and calculating the velocitycorresponding to the total number of revolutions dividedby the depth. THE MEASUREMENT OF VELOCITIES. As above said, the most suitable apparatus for measur-ing the velocities of current at different depths are the A J , / ^ a \ --/-- -sm^- - i- - - •a hydrometric apparatus—Moiilinct, Fliigcl—of Woltmann,or of Baumgarten, or of Amsler, the last with electricsignal (bell) and winch for great depths. In the portions of the cross-section where the velocityis very small floats can be used. Applying the above hydrometric apparatus, the velocityof current is calculated by the well-known formulaV =: a ■r b n, where n is the number of revolutions in a second, anda and b the constant coefficients to be determined fromexperiments in stagnant water. leadi
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
