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Pyæmia gives a tracing much as follows. Of course, cases differ; but pyæmia, as ordinarily seen, gives a comparatively low pyrexial temperature, as a rule, with sharp rises corresponding to rigors.

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The next tracing is that of the late French statesman, M. Léon Gambetta. His wound-temperature never rose over 101°, and the tracing, given here, commences with the sharp rise, which accompanied the development of the abscess at the ilio-coecal valve, which revealed itself after his wound in the wrist had healed and he had been out

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The following tracing was taken by Mr. Waller, from an empyema with pus discharging through the lung, at Victoria Park Hospital.

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The following two tracings were taken from two cases in my wards at Victoria Park Hospital. They both indicate softening tubercle: the upper one is from a case where the result is doubtful; but from the family history it is probable the case will ultimately succumb. While the latter is taken from a case with the worst prognosis; but which made a temporary rally, under treatment, and left the

hospital, without furnishing an opportunity of seeing the actual condition of the lung.

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With these the reader may contrast a tracing of galloping consumption-acute miliary tuberculosis.

The concluding tracings are those of the different forms of intermittent fever: quotidian, tertian, and quartan.

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In placing these temperature tracings before the reader, the writer disclaims anything pretending to a comprehensive

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handling of the matter of temperature-fluctuations. What is given here is merely a bird's-eye view of the subject; with some of the prominent points thrown up in outline. Nothing more! The subject is yet only in its infancy; and every observer will have to trust largely to his own experience. But what has been placed before him here may be a guide to him in casting his experience into some permanent concrete shape. It will help him (it is hoped) to systematise his observations; at least to some extent. If he be familiar with the work of Wunderlich, he will gain little from this chapter. But for the bulk of practitioners this chapter will be as instructive as any other in the treatise, whatever its value may be!

The subject of thermometry must not be made to stand alone from other functional disturbances of the body, as the respiration and the circulation; nor yet to be held out of proportion to these equally important matters. If the young practitioner will study the three together, compare them, and note their parallelism, or the want of it, in various maladies, he will come, as Dr. Campbell and others have, to see that when observations of two of the three have been taken, the third can usually be fairly calculated. Time

becomes an object as practice increases, and the systematic use of watch and thermometer together would soon teach the lesson of when the latter may be dispensed with; and, what is even more, when a thermometrical observation is urgently required. This systematised use of instruments of precision would be far more valuable to patient and practitioner alike, than a random resort to the thermometer, and a guess at the meaning of what it records.

The accompanying diagram is taken from a portion of a case of enteric fever, in which Wunderlich had the temperature, the pulse, and the respiration all carefully taken. The

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portion here given represents a somewhat sharp pyrexial rise occurring in the course of a mild case of typhoid or enteric fever. It will serve the purpose of demonstrating that there is a general parallelism betwixt the three. The thermometer, however, gives a more broken outline than the other two. Still, there is enough of resemblance to justify what has just been stated, that when two out of the three factors are taken, the third can usually be fairly calculated. Nothing more is claimed than that a busy man, who has carefully observed when he had the time, may often tell in later days when he may fairly dispense with a thermometri

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