tre line of the cylinder in regard to the air pump , with the head valves in one chamber common to both , arranged between the air pumps ; the doors for getting at the valves are placed on the top of the valve chambers , which is found a very con - venient and handy arrangement . One discharge pipe… … When the air pumps are situ - Fig . 306 . — Air Pump with Condenser outside fitted with , , ! , 1 . • 1 inverted Foot Valves and Discharge Chamber at ated underneath the motion bars , centre a good plan is to invert the foot A , Conden ser . B , Hot well , c , Foot - valve seat . 1 1 • _ i . 1 _ •…
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