"Partly fill with strong brine a Florence glask the cork of which carries a delivery-tube and a thermometer.…
"The hydraulic ram uses alternating water pressure, air pressure, and suction to provide a steady stream…
A system for manual delivery of mail to a series of recipients includes a stack of mail holders each…
One or more mail pieces are disposed in each holder, such that all of the mail pieces in each holder…
An illustration of a mouse postman delivering mail to a house in a tree.
"To the end of the delivery-tube of a Florence flask containing water, attach a 'trap' so that the water…
"Four-way cock, a cock having two passages in the plug and four passage-ways for delivery, or one which…