fruits like the peach, greengage, and mulberry, which almost melt in the mouth, contain a very large amount of soluble substances.  Some fruits, like the peach and apricot, carry but a small amount of sugar as compared with the free acid they contain.  Yet the free acid is not distinctly perceptible, because its taste is covered by a larger proportion of gum, pectin, and other gelatinous substances.  There are other fruits again, such as the currant and gooseberry, which are markedly acid, because there is only a small amount of gum and pectin, and a relatively larger amount of free acid.

With regard to fruit when eaten in its raw state, the question of ripeness is a most important ones and is always to be considered; so that whatever views may be entertained as to the dietetic value of ripe fruit, there is a consensus of opinion on the fact that when unripe it is most injurious.  Care must be taken, therefore, to see that it is perfectly ripe, and no considerations of economy must be allowed to over-ride the fact.  At the same time, though ripeness is a necessary qualification of wholesomeness, yet fruit must not be over-ripe, as changes occur which render it undesirable for the system, and thus in avoiding Scylla we may fall into Charybdis.  The skin of fruit should never be eaten, nor should the stones, pips, or seeds be swallowed, as there is a danger of their accumulating in a small pouch of the bowel known as the vermiform appendix.  Their lodgment in this little pocket is a constant source of peril, and would soon set up an inflammation, which must always be attended with a considerable amount of danger.

As to the question of the unripeness or over-ripeness of fruit, the following remarks by Dr. F.W.  Pavy, an acknowledged authority on all that relates to food, and worth recording:—­“Fruit forms an agreeable and refreshing kind of food, and, eaten in moderate quantity, exerts a favourable influence as an article of diet.  It is chiefly of service for the carbo-hydrates, vegetable acids, and alkaline salts it contains.  It enjoys, too, in a high degree, the power of counteracting the unhealthy state found to be induced by too close a restriction to dried and salted provisions.  Whilst advantageous when consumed in moderate quantity, fruit, on the other hand, proves injurious if eaten in excess.  Of a highly succulent nature, and containing free acids and principles liable to undergo change, it is apt, when ingested out of due proportion to other food, to act as a disturbing element, and excite derangement of the alimentary canal.  This is particularly likely to occur if eaten either in the unripe or over-ripe state; in the former case, from the quantity of acid present; in the latter, from its strong tendency to ferment and decompose within the digestive tract.  The prevalence of stomach and bowel disorders, noticeable during the height of the fruit season, affords proof of the inconveniences that the too free use of fruit may give rise to.”