Ideal Home Life - online book

A valuable and well-organized system for home education(homeschooling) 3 to 12 years.

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the bottom the same as the lift pump. This problem is more difficult, but it is here where the ingenuity of the boy will assert itself. Two glass jars are obtained and the bottom cut out of
Figure 21
the smaller one. The jars should have necks similar to those
shown in the drawing as you will find that type of jar easier
to fasten to the base. The power is transmitted by a belt to
the pulley wheel A, and thence by walking beam B to pistor
rod C which has a hard rubber washer attached by a screw
from the bottom which on the up stroke takes in water at D
which closes on the downward stroke by a rubber washer X21
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