Electrochemical and metallurgical industry . the operation. The accompanying illustration shows a very in-teresting new pyrometer for temperatures be-tween o and 2500° C. {i. c, up to about 4500° F.). The pyro-meter was invented by Mr. F. de Saintignon, and is built byMessrs Richard Freres, in Paris. The principle is extremely simple. .\ double metallic tubeliF is placed in the room, or apparatus, the temperature of Tl^( Al. AM) !:( ilCAl. IXDI S TRN. | 111. o- which i^ ti> 111- iiUMMiroil. If \v;itiT is nnw pasM-d iliri)iig;li thistube with a constant speed suf
Electrochemical and metallurgical industry . the operation. The accompanying illustration shows a very in-teresting new pyrometer for temperatures be-tween o and 2500° C. {i. c, up to about 4500° F.). The pyro-meter was invented by Mr. F. de Saintignon, and is built byMessrs Richard Freres, in Paris. The principle is extremely simple. .\ double metallic tubeliF is placed in the room, or apparatus, the temperature of Tl^( Al. AM) !:( ilCAl. IXDI S TRN. | 111. o- which i^ ti> 111- iiUMMiroil. If \v;itiT is nnw pasM-d iliri)iig;li thistube with a constant speed sufticiciitly higii to prevent evapo-ration, the difference of the temperatures of the water whenrntcrinf; and leaving the tube indicates the desired temperaturi-if the speed of the water is known. The whole apparatus, shown diaKranunaticnlly in liK >, con-sists essentially of the double nietallic tube /;/•(/. which iscalled the explorer. and the two thennonieters 7 and 7 The water is supplied from a reservoir in which it is held at :i. FIG. I.—IVKOMETEK W ITH KLOW lNc; U XTIIK. constant level. One of the two thermometers 7 aud 7 meas-ures the temperature of the water while passing into themetallic tube, the {>ther while passing out. The speed of the water is regulated by means of the cockli. the height of the water in the manometer being held atthe level H. In order to read the temperature it is only neces-sary to adjust the zero point of the scale to the tcmpera-tnre of the incoming water. Then the temperature of the out-
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectmetallurgy
