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Here we have, first, during three minutes, the initial temperature maintained; then a rise of 0.0516° C., preserved during the fourth and fifth minutes; then a return to zero, with a subsequent fall of 0.0344° C. below that point. During seven minutes after the contractions ceased the temperature fluctuated, being, in turn, 0·0602° C., 0·0344° C., and 0.0086° C., below the starting point.

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In this experiment, during seven and a half minute's contractions, the temperature oscillated on both sides of zero, with a range of 0.043° C. below, and of 0·0258° C. above that point, this oscillation continuing during eight and a half minutes following the cessation of the contractions.

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In this experiment, after a rise in the first half minute of 0.0516° C., the temperature declined to 0.0344° C. below the starting point, subsequently fluctuating between 0.0774° C. below, and 0.0086° C. above the zero, during the remaining seven and a half minutes of contractions, and also during the eight minutes of repose which followed.

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In the above experiment the temperature rose during the first minute 0.043° C., and maintained this elevation to the end of the fifth minute, when it fell back to 0.0258° C. above the starting point, retaining this position during the remaining minutes of contraction, and for six minutes of repose following.

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We have here, during the time of the contractions, an oscillation about the starting point of 0·0172° C. above and below the latter. At the end of the fourth minute after the contractions ceased, the temperature had fallen to 0·043° C. below the zero. Finally, at the close of the experiment, at the end of the twelfth minute from the commencement of the observations, the temperature was at the starting point.

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In this case, during the eight minutes of contractions, the temperature oscillated about the starting point with a range of 0.0602° C. below, and of 0.0344° C. above the latter. This oscillation persisted during the six minutes following the close of the muscular action.

15th Experiment.

1° deflection of galvanometer is equal to 0.004166°C.

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In this experiment, we have a decided and continuous fall of temperature from the commencement to the end of the observations; the fall at the close of the experiment amounting to 1-4708° C. This marked depression of temperature, like those given in 1st and 5th Experiments, was, however, beyond doubt, in a great measure independent of the experiment, its coincidence with the latter being simply accidental. This experiment, in fact, furnishes an excellent example of a rapid and decided lowering of the general level of temperature in the head, where no special cause of disturbance could be proved to exist.

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We have here again a decided and persistent fall of temperature during whole of the observation, probably explainable, in great part, like the results of the last experiment, by a lowering of the general. level of temperature irrespective of the muscular action.

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This experiment shows a decided rise of temperature, setting out from the commencement of the observations, and amounting, at the end of the fifth minute-when the contractions were discontinued-to 0.4791° C. At the close of the experiment at the end of the tenth minute-the temperature was still 0-4791° C. above the starting point. This was undoubtedly a case of elevation of the general thermal level—the opposite, in fact, of what occurred in the preceding two experiments.

18th Experiment.

1° deflection of galvanometer is equal to 0·0070422°C.

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In this experiment the temperature of the head fluctuated during the seven and a half minutes of contractions, being, in turn, at 0°, and at 0·0352° C. below and 0.014° C. above that point. After the contractions ceased the temperature rose, attaining, at the end of twelve and a half minutes from the commencement of the experiment, 0.0281° C. above the

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