| An instrument for measuring the flow of viscous fluids (9) |
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| Instrument used to measure the velocity of the blood flow (9) |
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| Instrument for measuring the force of electrical currents (9) |
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| Instrument for measuring the velocity of blood flow |
The Telegraph General Knowledge |
13 Apr 2020 |
| River edge circling round damaged tree – this gauges current |
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| Instrument which measures the velocity of blood flow |
The Times Specialist Sunday |
24 Dec 2017 |
| Instrument for measuring velocity of flow. |
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| Device for indicating speed of blood circulation. |
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| Device for indicating speed of blood circulation |
New York Times |
15 Feb 1942 |