At any rate this much is certain,—that whether it be in the air or whether it be caught from those who are ill of it, there are a great many persons who will neither take it one way or the other. If it is in the air, all people living in the same place must be equally exposed to it, but we see that at Vienna, out of a population of nearly 300,000 persons, only 2,800 have taken the Cholera: at Berlin, out of a population of 200,000, the deaths have been about 1,184. Or supposing that it is caught by one person from another, still we find that few only catch it; for of these 1,184 persons who have died at Berlin, more than 700 lived in 400 different houses, which 400 houses were inhabited by above 16,000 people. You see at once that they must have been very crowded, for this is at the rate of 40 inhabitants to every house, and yet out of these 40 persons, placed in circumstances the most likely, one would think, to make them catch it, not so many as two died from it. It should be added that there are in all about 7000 houses in Berlin, so that in 6600 of these there were not more than 400 deaths, and as the whole population of the City is only 200,000, it is plain that the houses in which the deaths took place must have been much more closely inhabited than is generally the case, for allowing 40 persons for every house in the whole town would make the population 280,000, instead of 200,000. It is quite clear then that all persons _will not_, or more properly speaking that only a very few persons _will_ take the Cholera. And now the great point remains, what can we do to hinder ourselves from taking it either from the air or from other sick persons? To this question experience has shown that the following answers may be given:— 1st. By avoiding drunkenness, and even the use of spirituous’ liquors altogether. It is agreed on all hands that persons known to have been in the habit of drinking freely have been particularly attacked by the Cholera. But then in order to escape this danger it is not enough to leave off drinking at a minute’s warning when the disease is actually amongst us. We must leave off drinking _beforehand_, that so our bodies may have time to get into a healthy state while the disease is yet at a distance from us.