. Essentials of laboratory diagnosis; designed for students and practitioners. inchesand weighs 3 pounds and 9 ounces. The lid is hinged at one endand when raised supports the working parts of the spring check allows the lid to be raised to a vertical position,where it is automatically held locked during observation. The U tube is provided with a scale, which has beenarranged to give the reading directly in millimeters of mercury,each space representing 2 millimeters Hg. The range is from0 to 300. A special and distinctive feature of the apparatus is themeans of preventing loss of
. Essentials of laboratory diagnosis; designed for students and practitioners. inchesand weighs 3 pounds and 9 ounces. The lid is hinged at one endand when raised supports the working parts of the spring check allows the lid to be raised to a vertical position,where it is automatically held locked during observation. The U tube is provided with a scale, which has beenarranged to give the reading directly in millimeters of mercury,each space representing 2 millimeters Hg. The range is from0 to 300. A special and distinctive feature of the apparatus is themeans of preventing loss of mercury from the manometer tubewhen the instrument is not in use. This is accomplished by 106 SPHYGMOMANOMETRY AXD SPHYGMOGRAPHY. means of two small cocks placed at either extremity of the Utube, and which are kept closed when the apparatus is not in eliminating all detachable parts, the time required tomake the reading is reduced to a minimum, the only prelimi-naries to the test being to lift the lid. open three cocks andattach two tubes to their respective Fig. 2-4.—Actual Size Pocket Indicator. 3. The aneroid sphygmomanometer represents the acme ofpressure-measuring instruments yet made. This instrument isat once small, compact, reliable, and accurate, and, whenproperly used, almost indestructible. The principle is that of the aneroid barometer except thatin the sphygmomanometer of this type the fixed pressure withinthe chambers (see Fig. 25) is the atmospheric pressure (insteadof a vacuum, as in the barometer), while the variable pressure isthat produced within the apparatus by means of the pump andwhich can be changed at the will of the operator. As character-istic of this type of instrument, the Faught aneroid may bedescribed as follows:— SIM1YCMOM ANOMKTKY. 107 The Faught Pocket Sphygmomanometer.—This instru-ment consists of a gold-plated aneroid gauge with a white-enameled dial, each spare of which represents 2 millimeters andwill give readings fr
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcetc, bookyear191
