Some gain in flesh as life goes on is a frequent thing here as elsewhere, and usually has no unwholesome meaning. Occasionally we see people past the age of sixty suddenly taking on fat and becoming at once unwieldy and feeble, the fat collecting in masses about the belly and around the joints. Such an increase is sometimes accompanied with fatty degeneration of the heart and muscles, and with a certain watery flabbiness in the limbs, which, however, do not pit on pressure. Alcoholism also gives rise in some people to a vast increase of adipose tissue, and the sodden, unwholesome fatness of the hard drinker is a sufficiently well known and unpleasant spectacle. The overgrowth of inert people who do not exercise enough to use up a healthy amount of overfed tissues is common enough as an individual peculiarity, but there are also two other conditions in which fat is apt to be accumulated to an uncomfortable extent. Thus, in some cases of hysteria where the patient lies abed owing to her belief that she is unable to move about, she is apt in time to become enormously stout. This seems to me also to be favored by the large use of morphia to which such women are prone, so that I should say that long rest, the hysterical constitution, and the accompanying resort to morphia make up a group of conditions highly favorable to increase of fat. Lastly, there is the class of fat anæmic people, usually women. This double peculiarity is rather uncommon, but, as the mass of thin-blooded persons are as a rule thin or losing flesh, there must be something unusual in that anæmia which goes with gain in flesh. Bauer[8] thinks that lessened number of blood-corpuscles gives rise to storing of fat, owing to lessened tissue-combustion. At all events, the absorption of oxygen diminishes after bleeding, and it used to be well known that some people grew fat when bled at intervals. Also, it is said that cattle-breeders in some localities--certainly not in this country--bleed their cattle to cause increase of fat in the tissues, or of fat secreted as butter in the milk. These explanations aid us but little to comprehend what, after all, is only met with in certain persons, and must therefore involve conditions not common to every one who is anæmic. Meanwhile, the group of fat anæmics is of the utmost clinical interest, as I shall by and by point out more distinctly. There is a popular idea, which has probably passed from the agriculturist into the common mind of the community, to the effect that human fat varies,--that some fat is wholesome and some unwholesome, that there are good fats and bad fats. I remember well an old nurse who assured me when I was a student that "some fats is fast and some is fickle, but cod-oil fat is easy squandered."