Dr. Le Fort also cites a number of interesting facts, showing that the indiscriminate visiting by attendants of lying-in women and patients suffering from disease, either within or outside the same establishment, has been a means of exciting puerperal fever action. _Admission of Students._—It is one of the contingencies necessarily due to connecting together the teaching of midwifery to students, with other portions of clinical instruction, that no precautions can prevent a student passing from a bad surgical case, or from an anatomical theatre, to the bedside of a lying-in woman, while sad experience has proved that the most fatal results may ensue from this circumstance. Of course risks of this kind are greatly increased when there are lying-in wards in general hospitals—especially if a medical school be attached to such a hospital. This risk had not been overlooked in the arrangements for the lying-in wards at King’s College Hospital, under which, while intended solely for the training of midwifery nurses, provision was made for a limited and regulated attendance of students; but, when enquiries came to be made into the probable cause of the high death-rates, it was found that the restrictions laid down as to the admission of students had been disregarded; also that there was a post-mortem theatre almost under the ward windows. _Effect of Numbers._—Dr. Le Fort has examined the influence exercised by numbers—or, in other words, by the size of hospitals—on the mortality after childbirth. His general results may be briefly stated as follows:— In hospitals receiving annually more than 2,000 lying-in cases, comprising the two Cliniques of Vienna, 1834–63; the Maternités of Paris, 1849–59; of Prague, 1848–62; and of Moscow, 1853–62; and the Lying-in Hospital of Dublin, 1847–54, the death-rate is 40·7 per 1,000. In hospitals receiving between 1,000 and 2,000 cases a year, including the Enfans Trouvés at Petersburg, 1845–59; the Maternité at Munich, 1859–62, and other places, the death-rate is 36 per 1,000. In hospitals receiving from 500 to 1,000 cases a year, including Pesth and the Maternité of Dresden, the death-rate is nearly 27 per 1,000. In hospitals where the number of deliveries is between 200 and 500 per annum, comprehending several places cited, among the rest Edinburgh and the London Lying-in Hospital, 1833–60, the death-rate is 30½ per 1,000. In hospitals receiving between 100 and 200 cases, as at Frankfort and Göttingen, the death-rate is 27·6 per 1,000. And in three small establishments receiving fewer than 100 a year, as at Lund, the death-rate is above 83½ per 1,000. From these facts Dr. Le Fort concludes that the relative mortality in small and large establishments is not favourable to small hospitals, _per se_. The benefit of subdivision may be neutralised by other circumstances.