ClipArt ETC
"Let P be a piston, fitted, air-tight, to the cylinder AB. As the piston is driven down, the air, unable to escape, is compressed; as it is drawn back, the air expands." —Quackenbos 1859

Compressibility of Air

"Let P be a piston, fitted, air-tight, to the cylinder AB. As the piston is driven down, the air, unable…

"For many purposes compressed air is preferable to steam or other gas for use as a motive power. In such cases air compressors are used to compress air. These are made in many forms, but the most common one is to place a cylinder, called the air cylinder, in front of the crosshead of a steam engine, so that the piston of the air cylinder can be driven by attaching its piston rod to the crosshead in a manner similar to a steam pump." —Hallock 1905

Air Compressor

"For many purposes compressed air is preferable to steam or other gas for use as a motive power. In…

"The condensing pump is an instrument for compressing a gas into a closed vessel, as in pumping air into a pneumatic tire of a bicycle, or oxygen or hydrogen into the cylinders commonly used for stereopticon purposes, or charging water with carbon dioxide for sale as 'soda water'." -Avery 1895

Condensing Pump

"The condensing pump is an instrument for compressing a gas into a closed vessel, as in pumping air…

This illustration shows the machine used to compress cotton.

Cotton Compresser

This illustration shows the machine used to compress cotton.

An illustration of a cotton press which presses the cotton into compressed bundles which is helpful in transporting.

Cotton Press

An illustration of a cotton press which presses the cotton into compressed bundles which is helpful…

This mechanical drawing depicts a cotton press; used to compress cotton.

Press, Cotton

This mechanical drawing depicts a cotton press; used to compress cotton.

"In bleeding from the thigh, leg, or foot press backward with the thumbs on the femoral artery at the middle of the groin where the artery passes over the bone. The point is a little higher up than that indicated in Fig 6." — Moss, 1914

Femoral compression

"In bleeding from the thigh, leg, or foot press backward with the thumbs on the femoral artery at the…

A device used for measuring pressure.

Piezometer

A device used for measuring pressure.

"In bleeding from wounds of the shoulder or armpit the subclavian artery may be reached by pressing the thumb deeply into the hollow behind the collar bone." — Moss, 1914

Subclavian compression

"In bleeding from wounds of the shoulder or armpit the subclavian artery may be reached by pressing…