XIV INDEX OF THE ILLUSTRATIONS. 



Red corpuscles of embryo of fowl, 670 diam. - - Plate ix. Fig. 1 



The same, in water, 670 diam. - - ix. 2 



Red corpuscles of adult fowl, 670 diam. - ix. 3 



The same of young frog, 670 diam. - - ix. 4 



The same of the adult frog, 670 diam. - - - ix. 5 



The same united into chains, 670 diam. - - ix. 6 



DEVELOPMENT OF EMBRYO OF CHICK. 



The cicatricula prior to incubation - - - x. 1 



The same at the end of first day of incubation - x. 2 



The same at the thirty-sixth hour - - x. 3 



The same at the close of the second day - - x. 4 



The same at the end of the third day - - - x. 5 



The embryo on the conclusion of the fourth day - x. 6 



The same at the termination of the fifth day - - x. 7 



The embryo of six days old - - - - x 8 



The embryo of the ninth day of development - - x. 9 



The same at the end of the seventh day, detached x. 10 



Ditto at the end of the ninth day, also detached x. 11 



MUCUS. 



Corpuscles of, in their ordinary condition, 670 diam. - xi. 1 



The same collapsed, 670 diam. - - xi. 2 



The same', showing the action of water, 670 diam. - xi. 3 



The same acted on by dilute acetic acid, 670 diam. - xi. 4 

 The same after the action of undilute acetic acid, 670 



diam. - - - - - - xi. 5 



The same in process of development, 670 diam. - xi. 6 



Vaginal mucus, 670 diam. - xn. 1 



JEsophageal mucus, 670 diam. - - xn. 2 



Bronchitic ditto, 670 diam. - - - - xn. 3 



Vegetation in mucus, 670 diam. - - - xn. 4 



Mucus of stomach, 670 diam. - - - - xn. 5 



Vaginal tricho-monas - - - - xn. 6 



PUS. 



Corpuscles of laudable pus, 670 diam. - - xm. 1 



The same acted on by acetic acid, 670 diam. - - xm. 2 



The same treated with water, 670 diam. - xm. 3 



Epithelial scales from pustule, 670 diam. - xm. 4 



Corpuscles from scrofulous abscess, 670 diam. - - xm. 5 



Vibrios in venereal pus, 670 diam. - - xm. 6 



