Apparatus for calibration of a uroflowmeter.
A device has been constructed in order to obtain a flow analogous with the flow during micturition. Sources of error with instruments used in connection with micturition analysis can be determined by using this apparatus.
The uroflometer in the study of bladder neck obstructions.
Observation that the size and force of the urinary stream are diminished in certain urologie conditions dates back many years. In 1932 Ballenger suggested that by periodically measuring the maximum distance from his feet that a man with a full bladder could eject his urine one might follow the effect of an enlarging prostate. Rose, Denny-Brown, Robertson, Langworthy, Kolb, and Lewis have studied by cystometric means the normal and abnormal physiology of the detrusor urinae muscle. Simons has likewise studied the physiology of both the internal and the external sphincters of the urethra. In 1940 Sigematu of Japan published a report on measuring the urinary flow by the use of a "slit-flow-clock" apparatus. Correlation between volume and time was not made. He expressed the opinion that the procedure was of little diagnostic value. Apparatus for measuring the minute volume of the urinary flow with a turbine or propeller were discarded
Geomagnetic micropulsations due to the motion of ocean waves
When sea waves move in the magnetic field of the earth, electric currents are generated in the water volume. These currents give rise to a small magnetic field which perturbs the earth's field. For plane trochoidal waves, this perturbing field decays exponentially with altitude and lies in a vertical plane which is oriented in the direction of wave propagation. The magnitude of the perturbing field also depends upon the magnitude and dip angle of the earth's field, and upon the height, wavelength, and propagation direction of the sea waves. For north-south waves, sea state 5, and an altitude of 100 feet, the perturbation is of the order of 0.1 gamma.