On the different forms of breathing

I must beg leave at the outset to acknowledge the valuable aid of my Assistant, Mr. R. B. Moris, F .C. S., in the present inquiry. An investigation of this kind, necessitating much consideration, can only be carried to a successful issue by arguments and discussions, and to Mr. Moris much credit is due for the light these discussions have shed on the inquiry; I feel also indebted to him for the care he has bestowed on the numerous analyses he has made for me, and for the accuracy with which-his work has invariably been done. From a general view of the function of respiration it follows that there are four fundamental forms of breathing; their characters are the following:—