Ҿ˹˹ѧ
PDF
ePub
[blocks in formation]

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.

10th Experiment. 1° deflection of galvanometer is equal to 0:008602°C. At the end of0 minutes

0° .

0° Commenced contractions. -5°

-0.013°C. 1, 2, 3, 4, 5, 6, 7, 7)

0° minutes

Temperature oscillating.

+3°

[ocr errors]

Stopped contractions.

[blocks in formation]
[blocks in formation]

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.

11th Experiment.
1° deflection of galvanometer is equal to 0.008602°C.

Rise or fall of temperature.
Time from
commencement Deflections of Thermometric
of contractions. galvanometer. values.

Comments.

[merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small]

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.

0 minutes ......

12th Experiment. 1° deflection of galvanometer is equal to 0:008602°C. At the end of

0°... ......... 0° Commenced contractions. 1

+5°.

+0.0430°C. 2, 3, 4, 5 minutes. 6 minutes ....

+ 0·0258°C. 7, 8, 9, 10 minutes

+» .........

+

Stopped contractions. 11, 12, 13, 14, 15, 16

minutes....

+,

+

+ 39 ...........

..............

[ocr errors]

+

+

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:

13th Experiment.
1° deflection of galvanometer is equal to 0:008602°C.

Rise or fall of temperature.
Time from
commencement Deflections of Thermometric
of contractions. galvanometer. values.

Comments.

[blocks in formation]

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.

............

14th Experiment. 1° deflection of galvanometer is equal to 0.008602°C. At the end of — 0 minutes

0°.

0° Commenced contractions. -7°.

-0.0602°C. 1, 2, 3, 4, 5, 6, 7, 8

0°.

0° minutes.......

Temperature oscillating. + 0.0344°C.

Stopped contractions. -7°. 9, 10, 11, 12, 13, 14

:-0.0602°C.

0° . minutes.......

Temperature oscillating. +4°

. +0·0344°C

[ocr errors]

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.

Rise or fall of temperature.
Time from
commencement Deflections of Thermometric
of contractions. galvanometer. values.

Comments.

[merged small][merged small][ocr errors][merged small][merged small][ocr errors][merged small][merged small][merged small]

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.

16th Experiment.

1° deflection of galvanometer is equal to 0·004166°C. At the end of 0 minutes

0°. ............ 0° Commenced contractions. 4

85°.

.-0•3541°C. 6

-100°

-0.4166°C. 7

--155o.

-0.6458°C.

Stopped contractions. 12

-358°..... .-1'4916°C.

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.

17th Experiment.
1° deflection of galvanometer is equal to 0:004166°C.

Rise or fall of temperature.
Time from
commencement Deflections of Thermometric
of contractions. galvanometer. values.

Comments.

[merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][ocr errors]

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. At the end of0 minutes

0°.

0° Commenced contractions.

-5° 1, 2, 3, 4, 5, 6, 7, 71

-0.0352°C. 0°.

. minutes ..

Temperature oscillating. +0.0140°C.

Stopped contractions. 12} minutes

+0.0281°C.
+ 0.0352°C.

[ocr errors]
[ocr errors]

13)

+5°..............

[ocr errors]

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

« ͹˹Թõ
 »