According to the calculations and tables of Mr. Ansel, in his work on "Friendly Societies," the men of the army-ages, from 20 to 40, in the working-classes, lose, on an average, five days and six-tenths of a day by sickness in each year, which will make one and a half per cent, of the males of this age and class constantly sick. Mr. Neison's calculations and tables, in his "Contributions to Vital Statistics," make this average somewhat over seven days' yearly sickness, and one and ninety-two hundredths of one per cent, constantly sick. These were the bases of the rates adopted by the Health-Assurance companies in New England, and their experience shows that the amount of sickness in these Northern States is about the same as, if not somewhat greater than, that in Great Britain, among any definite number of men. The rate of mortality is more easily ascertained, and is generally calculated and determined in civilized nations. This rate, among all classes of males, between 20 and 40 years old, in England and Wales, is .92 per cent.: that is, 92 will die out of 10,000 men of these ages, on an average, in each year; but in the healthiest districts the rate is only 77 in 10,000. The mortality among the males of Massachusetts, of the same ages, according to Mr. Elliott's calculations, is 1.11 per cent, or 111 in 10,000. This maybe safely assumed as the rate of mortality in all New England. That of the Southern States is somewhat greater. These rates of sickness and death--one and a half or one and ninety-two hundredths per cent, constantly sick, and seventy-seven to one hundred and eleven dying, in each year, among ten thousand living--may be considered as the proportion of males, of the army-ages, that should be constantly taken away from active labor and business by illness, and that should be annually lost by death. Whether at home, amidst the usually favorable circumstances and the average comforts, or in the army, under privation and exposure, men of these ages may be presumed to be necessarily subject to this amount, at least, of loss of vital force and life. And these rates may be adopted as the standard of comparison of the sanitary influences of civil and military life. SICKNESS AND MORTALITY OF THE ARMY IN PEACE.