Probably there has been more sickness in all the armies, as they have gone farther southward and the warm season has advanced. This would naturally be expected, and the fear is strengthened by the occasional reports in the newspapers. Still, taking the trustworthy reports herein given, it is manifest that our Union army is one of the healthiest on record; and yet their rate of sickness is from three to five times as great as that of civilians of their own ages at home. Unquestionably, this better condition of our men is due to the better intelligence of the age and of our people,--especially in respect to the dangers of the field and the necessity of proper provision on the part of the Government and of self-care on the part of the men,--to the wisdom, labors, and comprehensive watchfulness of the Sanitary Commission, and to the universal sympathy of the men and women of the land, who have given their souls, their hands, and their money to the work of lessening the discomforts and alleviating the sufferings of the Army of Freedom. OTHER LIGHTER AND UNRECORDED SICKNESS. The records and reports of the sickness in the army do not include all the depreciations and curtailments of life and strength among the soldiers, nor all the losses of effective force which the Government suffers through them, on account of disease and debility. These records contain, at best, only such ailments as are of sufficient importance to come under the observation of the surgeon. But there are manifold lighter physical disturbances, which, though they neither prostrate the patient, nor even cause him to go to the hospital, yet none the less certainly unfit him for labor and duty. Of the regiment referred to by Dr. Mann, and already adduced in this article, in which 700 were unable to attend to duty, 340 were in the hospital under the surgeon's care, and 360 were ill in camp. It is probable that a similar, though smaller, discrepancy often exists between the surgeon's records and the absentees from parades, guard-duty, etc.