3. In a Civil Hospital it is objectionable to give the female patients right to take exercise in corridors which the officers and servants have constantly to traverse to go to and from the wards. In a Military Hospital it is of little comparative disadvantage that the patients should do this, although, 4. In building a hospital it might be well worth while to contrive that the covered space, essential to give the patients power of taking exercise, should be used solely for that purpose. 5. In Germany, the general opinion is in favour of small wards, twenty beds are considered the desirable maximum; twelve, _per se_, better than twenty. Ditto in Belgium, under the same restriction, although, in practice, there are wards containing larger numbers. In the old Hospitals at Paris, the number of patients is too large. The Charité has long great wards of 100 and 120 patients. At St. Louis (which is mostly for cutaneous, not venereal, diseases, where the patients usually are long under treatment and able to go about, and where there is little acute illness,) wards of eighty and seventy beds are the rule, smaller wards the exception. This may be considered an exceptional class of patients. The Charité, somewhat densely pressed upon by neighbourhood, is also not considered a favourably circumstanced Hospital as to air. Putting aside for a moment the sanitary question, which we have fully discussed elsewhere, and which appears to be decided in favour of wards of from twenty to thirty patients, we will look upon the question of administration. The moment we consider that a great public Hospital has to provide efficient attendance for all the sick it receives, that it must be economical of attendance, both because the expense of attendance, as well as the other requirements of the sick, commands all practicable economy; and because efficient attendance in sufficient numbers is difficult to obtain; it becomes evident that it is far better for the sick to have larger wards, efficiently served by as few attendants as is compatible with efficiency. This, which is the fair statement of the case, strikes those who have watched the working of the system of small wards in North Germany as more true than ever. Such persons consider that the size and numbers of the wards at the Lariboisière Hospital, viz., thirty-four beds, including the two in the little ward, are good: that preserving the existing considerable space between the beds, and supposing the same ratio of conditions as to windows, &c., and the small ward for two at the end, wards of forty or fifty would be equally healthy for the sick, but that the number fifty should not be surpassed. Assuming, however, that thirty patients in a ward, or thirty-two, are the maximum number, sanitary and administrative necessities being conciliated, let us see what we do in our Military Hospitals at home.