 | Royal Society (Great Britain) - 1888 - 572 σελίδες
...three-way cock E is turned so as to shut the communication with D and open that between B and C. As the pressure of the air on the surface of the mercury in B diminishes the mercury falls both in A and in /, leaving a Torricellian vacuum above it, and, as... | |
 | Sir John Eliot - 1890 - 284 σελίδες
...upper space AB is practically a vacuum. The column of mercury in the tube is kept up, or supported, by the pressure of the air on the surface of the mercury in the cistern. This is at once proved by the fact that if the whole arrangement were put inside a large glass... | |
 | Sir William Slingo, Arthur Brooker - 1890 - 664 σελίδες
...A, to be lowered sufficiently, the mercury will flow out of B and down T until it is just balanced by the pressure of the air on the surface of the mercury in A. The air in the receiver or bulb then expands uniformly so as to occupy the space in the pump- head... | |
 | Edward Richard Shaw - 1891 - 342 σελίδες
...than in tube B? 'What is the ratio between this difference and the reading of the barometer? If, then, the pressure of the air on the surface of the mercury in the 10 2 / 0 t Fiu. 96. FIG. 97. open tube H sustains a weight of mercury yi the closed tube A. equal to... | |
 | David Salmon - 1892 - 280 σελίδες
...column is about 30 inches high, and then remains stationary. Elicit that the mercury is kept in the tube by the pressure of the air on the surface of the mercury in the trough. Elicit (i) that there is a vacuum at the top of the tube ; (2) that pressure is therefore exerted... | |
 | Josiah Thomas Scovell - 1894 - 412 σελίδες
...invert the tube, and place the end closed by the finger in a cup of mercury; then withdraw the finger. The pressure of the air on the surface of the mercury in the cup will sustain a column of mercury nearly thirty inches high in the tube. Experiments of this kind... | |
 | Vincent Thomas Murché - 1895 - 320 σελίδες
...The air. What does duty for the weights ? The mercury in the tube. What does the mercury measure ? The pressure of the air on the surface of the mercury in the basin. But suppose the pressure of the air increased. What would happen then ? The increased pressure of the... | |
 | Sir William Slingo, Arthur Brooker - 1895 - 808 σελίδες
...A, to be lowered sufficiently, the mercury will flow out of B and down T until it is just balanced by the pressure of the air on the surface of the mercury in A. The air in the receiver or bulb then expands uniformly so as to occupy the space in the pump-head... | |
 | 1895 - 534 σελίδες
...A, to be lowered sufficiently, the mercury will flow out of ft and down x until it is ju^t balanced by the pressure of the air on the surface of the mercury in A. The air in the receiver or bulb then expands uniformly so as to occupy the space in the pump-head... | |
 | William Watson - 1896 - 264 σελίδες
...does not leak,1 the numbers in the second and fourth columns will be equal ; showing that, by altering the pressure of the air on the surface of the mercury in the bottle A, the height of the column of mercury E alters, and the amount by which it alters is equal... | |
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To explain the construction of the common barometer, and to shew that the mercury is sustained in it by the pressure of the air on the surface of the mercury in the basin. 
