2.11 Vesicles in the Lung. Anatomy of a Pregnant Rabbit. Experiments in Lungs. The Milky Vessels of the Udders. Observations in a Swan, Etc.
If ever any slowness in answering joined to quickness of writing, then certainly this one needs to be excused: although blessed during the same time with two letters, I have dispatched none for months and, as it is not permitted to delay further my duty of answering, an abundance of evidences has accumulated. But your well-known affability promises easy indulgence for both.