Tea and coffee are adulterated to a very great extent, and persons using them will be greatly imposed upon. This is an evil we cannot remedy. If people make use of them, their experience in selecting them must be their guide; however, it is believed that the Black and Japan varieties of tea are the least apt to be adulterated, and coffee, to insure purity, should be purchased in the berry, and ground by the purchaser.
In preparing tea an infusion should be made by adding boiling water to the leaves, and permitting them to steep for a few minutes only, for a concentrated decoction, made by boiling for a long time, liberates the astringent and bitter principles and drives off the agreeable aroma which resides in a volatile oil.
Coffee should be prepared by adding cold water to the ground berry, and raising it slowly to the boiling point. Long-continued boiling liberates the astringent and bitter principles upon which its stimulant effects to a great extent depend, and drives off with the steam the aromatic oil from which the agreeable taste is derived.
ALCOHOLIC LIQUORS.
These are divided into three classes: malted, fermented, and distilled. They all contain more or less alcohol, and their effects are, therefore, in some respects similar, and, in the words of Dr. B.W. Richardson, the great English authority on hygiene: "To say this man only drinks ale, that man only drinks wine, while a third drinks spirits, is merely to say, when the apology is unclothed, that all drink the same danger. * * Alcohol is a universal intoxicant, and in the higher orders of animals is capable of inducing the most systematic phenomena of disease. But it is reserved for man himself to exhibit these phenomena in their purest form, and to present, through them, in the morbid conditions belonging to his age, a distinct pathology. Bad as this is, it might be worse; for if the evils of alcohol were made to extend equally to animals lower than man, we should soon have, none that were tameable, none that were workable, and none that were eatable." Researches have shown that the proportion of half a drachm of alcohol to the pound weight of the body, is the quantity which usually produces intoxication, and that an increase of this amount to one drachm immediately endangers the life of the individual. The first symptom which attracts attention, when alcohol commences to take effect upon the body, is an increase in the number of the pulsations of the heart. Dr. Parkes and Count Wolowicz conducted a series of interesting experiments on young adult men. They counted the pulsations of the heart, at regular intervals, during periods when the subject drank only water; and then they counted the beats of the heart in the same individual during successive periods in which alcohol was drunk in increasing quantities.
The following details are taken from their report:
"The highest of the daily means of the pulse observed during the first or water period was 77.5; but on this day two observations were deficient. The next highest daily mean was 77 beats.
If instead of the mean of the eight days, or 73.57, we compare the mean of this one day, viz., 77 beats per minute, with the alcoholic days, so as to be sure not to over-estimate the action of the alcohol, we find:
On the ninth day, with one fluid ounce of alcohol,
the heart beat 430 times more.
On the tenth day, with two fluid ounces, 1,872 times more.
On the eleventh day, with four fluid ounces, 12,960 times more.
On the twelfth day, with six fluid ounces, 30,672 times more.
On the thirteenth day, with eight fluid ounces, 23,904 times more.
On the fourteenth day, with eight fluid ounces, 25,488 times more.
But as there was ephemeral fever on the twelfth day, it is right to make a deduction, and to estimate the number of beats in that day as midway between the twelfth and twenty-third days, or 18,432. Adopting this, the mean daily excess of beats during the alcoholic days was 14,492, or an increase of rather more than thirteen per cent.