Pneumonia
inflammation of the lung, usually caused by exposure to cold or wet, a cold draught or chill after being over-heated, injury to the chest, irritation, or as a secondary affection in smallpox, typhoid or puerperal fever, and other low wasting diseases; it may also be caused by long continued congestion of the lung substance, particularly in heart disease, or in old and weak people who are bedridden from any cause .
Pneumonia terminates generally in resolution and recovery, but sometimes in death from collapse and exhaustion.
PO, the largest river of Italy, rises on Monte Viso, one of the Cottian Alps, at an altitude of 6,405 feet, close to the French frontier. It flows E. for upward of 20 miles, when, arriving before Saluzsometimes over 20,000 strokes a minute, zo, it emerges from its rocky defiles and and it is claimed (which claim enters upon the plain. From Saluzzo it is not uncontested) by some engi- flows N. N. E. past Turin to Chivasso ; neers that valveless types have a much there it changes its course toward the longer life and are less liable to get E., in which direction it flows to its emand are less liable to get E., in which direction it flows to its emout of order. The percussion tools vary bouchure in the Adriatic. Upward of 55 miles from its mouth, above Ferrara, tools vary bouchure in the Adriatic. Upward of in size from a small hand hammer to 55 miles from its mouth, above Ferrara, the large stationary plate riveter weighing tons.
Rotary Tools. The principal rotary pneumatic tools are the drills, reamers, etc. They in a great range of sizes, and are used for many things, for a thing such as drilling wood and metal, reaming boiler tubes, grinding valve seats and cylinders, polishing and grinding. The rotary tools usually operate under a pressure of about 75 pounds per square inch. The motor may be of the rotary type or of the reciprocating type with either fixed or oscillating cylinders, operating on a crank shaft to which the tool is fastened by a suitable mechanism. The great demands on the part of the shipyards for pneumatic tools of all types at the time of the World War gave even greater impetus to the already great and fast growing industry of manufacturing pneumatic tools. delta, 60 miles wide Ravenna, a city once on it begins to form its delta, 60 miles wide from N. to S. The delta is rapidly growing in area. the seashore, now stands 4 miles inland. The Po receives from the left the Ticino, Adda, Mincio, and other streams and from the right the Trebbia and others.
It has an entire length of 360 miles, and drains an area of nearly 28,900 square miles.