. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. s of a small metallic tubebent into a circular form, having one end fixed to a sup-port, the other free to move, but connected by a finespring to a shaft which carriesa needle or dial-indicator. Thetube is filled with a highly ex-pansive fluid, sensitive to thesmallest elevation of consequence of its expansionthe tube uncoils, producing acorresponding vibration of theindicator. Upon cooling the tubecurls and the indicator returnsto its point of rep
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. s of a small metallic tubebent into a circular form, having one end fixed to a sup-port, the other free to move, but connected by a finespring to a shaft which carriesa needle or dial-indicator. Thetube is filled with a highly ex-pansive fluid, sensitive to thesmallest elevation of consequence of its expansionthe tube uncoils, producing acorresponding vibration of theindicator. Upon cooling the tubecurls and the indicator returnsto its point of repose. The dialover which the indicator movesis graduated according to boththe centigrade and Fahrenheitscales, and embraces a range oftwenty degrees of the former(from 20c to 40° C.) and forty of Fig. 3S!) Avit-the latter (from 70° to 110° P.). la^Jh)ermometer- ^In the Fahrenheit scale, which is given the preference upon the instruments sold in thiscountry, each degree is divided, from the seventieth tothe ninetieth, into halves ; and from the ninetieth to theone hundred and tenth, iuto fifths. A device for regis-. tering the temperatures lias recently been added, in theform of a stop-catch passing through the stein, and soarranged that its withdrawal arrests the needle, while its*return releases it. The case is impervious to liquids, andmay be inserted into the mouth as well as into the instrument appears to answer the purposes of a clin-ical thermometer, except for insertion into the closedcavities, which are accessible to the mercurial instru-ment (rectum, vagina, etc.), and is in some respectspreferable to those constructed wholly of glass. Thechief points of excellence claimed for it, aside from theingenuity displayed in its construction, are the especialsuitability of its form for insertion into the axilla, andfor use in practice among children, its freedom frombreakage and from alteration by age, the ease with whichit is read, and the automatic re
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmedicine, bookyear188
