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POPULAR SCIENCE REVIEW. 
with the motion of the heart in the living animal because it 
stops oxidation^ and cold does the self-same thing. 
(f.) Excessive exerciseof thebody,andoverwork either of body 
or of mind^ should be avoided_, specially during those seasons 
when a sudden fall of temperature is of frequent occurrence. 
For exhaustion_, whether physical or mental, means loss of 
motion in the organism ; and loss of motion is equivalent to, 
nay, is the same as, loss of heat. 
In the second ijlace, the subject of this paper has some re- 
ference to the bearing of the public towards the labours of 
medical men who have to meet the effects of the low wave 
of heat. The ]3ublic, looking on the doctor as a sort of 
mystic or high priest who ought to save, are too often dis- 
satisfied with his work. Let the dissatisfied think of what is 
meant by saving when there is a sudden fall in the thermometer. 
Let them recall that it is not bronchitis as a cause of death, 
nor apoplexy, nor heart disease, as such, that the doctor is 
asked to oppose, but an all-pervading influence which over- 
whelms like the sea, and against which, in the mass, individual 
effort stands paralysed and helpless. "When the doctor is 
summoned the mischief has at least commenced, and, it may 
be, is over, while treatment by mere medicines sinks in eveiy 
case into secondary significance. Writing now to the public 
and not to the profession, I am of all things anxious to place 
this last part of my subject forcibly before them, that they 
may know how to be charitable to those who are called upon 
to minister to health, and may not laugh down those ministers 
who are candid enough to bow humbly before the great and 
inevitable truth, and who, professing no specific cure by 
nostrum or symbol, try to lead towards recovery by teaching 
elementary principles, and by making the unlearned the par- 
ticipators in their own learning. 
The title of this paper, suggested to me by the accomplished 
editor of the Popular Science Eeview, would afibrd scope for 
a much more elaborate essay. Waves of high temperature 
have their specific influence also, encouraging some diseases 
and arresting others. I must not be tempted here to enter 
on this wider field, but catching the very cold inspiration of 
the season, must perforce, sternly as my mistress Nature 
herself, leave the good reader to console himself, as best he 
may, with thafi"which is before him. 
