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Compressed Air Treatment

a system of treatment in which use is made of air under pressure. The treatment is used for tuberculosis, and in some forms for asthma and chronic bronchitis. There are two main methods of administering the treatment. In the first the patient is placed in an air-tight chamber, and the pressure of the air is first the patient is placed in an air-tight increased. In this case the pressure on all parts of the body is the same, and is said to cause increased absorption of oxygen. In the second method, od, the paoxygen. In the second method, the pahe places in his mouth being the only connection with the outside air, and the air pressure in the cabinet is reduced; thus the pressure on the lungs is greater than on any other part of the body, which may relieve collapse of the pul monary vesicles. monary vesicles. which may relieve collapse of the pulchine that is operated by a key-board in the manner of a typewriter. It consists COMSTOCK LODE of a box entirely inclosing the mechafrom the box in typewriter fashion. ings in which numbers appear, and above from the box in typewriter fashion.

Along the front edge of the box are openare 72 in number, and each has two figare 72 in number, and each has two figfigure and the other a small red one. ures painted on it. One is a large black The black ones indicate the keys that are to be struck in addition and multiplication, and the red ones those to be struck in division and subtraction. The pends upon the practice of the operator successful operation of the machine detypewriter depends upon the amount of in the same manner that efficiency of the practice that the operator has had. No proficiency in mathematics is required skilled in handling the keys can rattle on the part of the operator; anyone away at the comptometer as confidently large sums or dividing millions by thouas if he were writing letters on a typelarge sums or dividing millions by thouwriter, and all the time be adding up thinking usually required of the mathe- sands without any of the laborious matician, the bookkeeper and the accountant.

COMPULSORY MILITARY SERV- UNITED STATES.

ICE.

ICE. See MILITARY ORGANIZATION, COMPULSORY MILITARY SERV-