DESCRIPTION OF PLATES. XXvii 



DESCRIPTION OF PLATE XIV. 

 Bacillus Leprae. 



Following p. 408. 



FIG. 1. From a section of the skin of a leper. The section is, almost in 

 its entirety, stained red, and, with moderate amplification, has a finely 

 granular appearance. Stained by the Ziehl-Neelsen method (carbolised 

 fuchsine and methylene-blue). x 200. 



FIG. 2. Part of the same preparation with high amplification, showing that 

 the appearances described above are due entirely to an invasion of the 

 tissue by the bacilli of leprosy, x 1500. 



DESCRIPTION OF PLATES XV. AND XVI. 



Actinomyces. 



Following p. 432. 



PLATE XV. 



FIG. 1. From a preparation of the grains from an actinomycotic abscess in 

 a boy ; examined in glycerine. The drawing has been made of a com- 

 plete rosette examined by focussing successively the central and peripheral 

 portions. Towards the centre the extremities of the clubs are alone 

 visible ; they vary in size, and if pressed upon by the cover-glass give the 

 appearance of an irregular mosaic. Towards the periphery the clubs are 

 seen in profile, and their characteristic form recognised. At one part 

 there are several elongated elements, composed of separate links, x 1200. 

 FIG. 2. Different forms of clubs from preparations in which the rosettes have 

 been flattened out by gentle pressure on the cover-glass, x 2500. 



(a) Single club. (ft) Bifid club, (c) Club giving rise to four 

 secondary clubs. (cT) Four clubs connected together, recalling 

 the form of a bunch of bananas. (<?) Mature club with a lateral 

 bud. (/) Apparently a further development of the condition 

 represented at (<?). (^) Club with a lateral bud and transverse 

 segmentation, (h) Single club with double tranverse segmenta- 

 tion, (i) Club with oblique segmentation, (j) Collection of 

 four clubs, one with lateral gemmation, another with oblique 

 segmentation. (Ji) Club with lateral buds on both sides, and 

 cut off square at the extremity. (I) Club with a daughter club 

 which bears at its extremity two still smaller clubs, (ni) Club 

 divided by transverse segmentation into four distinct elements. 

 O) Elongated club composed of several distinct elements. (0)and 

 ( j?) Clubs with terminal gemmation. (#) Palmate group of clubs, 

 (r) Trilobed club. (*) Club with apparently a central channel. 

 () Filament bearing terminally a highly refractive oval body. 



PLATE XVI. 

 FlG. 1. From a section of a portion of the growth removed from a boy 



during life. The tissue was hardened in alcohol, and cut in celloidin. 



The section was stained by Gram's method and with orange-rubin. x 50. 

 FlG. 2. From the same section. A mass of extremely fine filaments occupies 



the central part of the rosette. Many of the filaments have a terminal 



enlargement. The marginal part shows a palisade of clubs stained by the 



orange-rubin. x 500. 



