----------|-----------|------------|---------|-------------
| in. | | in. | in. in. |
21/4 | 4 | 1,100 | 26 | 14 by 14 |
31/2 | 5 | 1,000 | 28 | 14 " 15 |
6 | 61/2 | 800 | 30 | 16 " 16 |
10 | 8 | 700 | 32 | 18 " 18 |
-----------------------------------------------------------

_Double Engines_.
-----------------------------------------------------------
Brake | | | | |
Horsepower| Bore of | Revolutions| | |
at 62 lb.| Cylinder. | per minute.| Height. |Floor Space.|
Boiler | | | | |
Pressure. | | | | |
----------|-----------|------------|---------|-------------
| in. | | in. | in. in. |
41/2 | 4 | 1,100 | 26 | 14 by 20 |
71/4 | 5 | 1,000 | 28 | 14 " 20 |
12 | 61/2 | 800 | 30 | 16 " 26 |
20 | 8 | 700 | 32 | 18 " 32 |
-----------------------------------------------------------

The manufacturer is Mr. F.D. Bumstead, Hednesford,
Staffordshire.--_Engineering_.

* * * * *

THE CHINESE PUMP.

If a glass tube about three feet in length, provided at its upper
extremity with a valve that opens outwardly, and at its lower with one
that opens inwardly, be dipped into water and given a series of up and
down motions, the water will be seen to quickly rise therein and finally
spurt out at the top. The explanation of the phenomenon is very simple.
Upon immersing the tube in the water it fills as far as to the external
level of the liquid, and the air is expelled from the interior. If the
tube be suddenly raised without removing its lower extremity from the
water, the valve will close, the water will rise with the tube, and,
through the velocity it has acquired, will ascend far above its preceding
level. Now, upon repeating the up and down motion of the tube in the water
five or six times, the tube will be filled, and will expel the liquid
every time that the vertical motion occurs.

[Illustration: THE CHINESE PUMP.]

We speak here of a _glass_ tube, because with this the phenomenon may be
observed. Any tube, of course, would produce