XXX DESCRIFrrON OF PLATES. 



vicinity of which the pulmonary alveoli are compressed. It is composed 

 of a number of separate neoplasms, and each of the latter is composed of 

 secondary centres of growth resembling the giant-cell systems of bacillary 

 tuberculosis. The new growth is composed of ray-fungi, large multi- 

 nucleated cells, sometimes distinct giant cells, round cells, epithelioid cells, 

 and, surrounding them, fibrous tissue. On examination of the same 

 specimen with a higher power the typical rosettes of clubs are sometimes 

 surrounded by multinucleated cells, and sometimes small rosettes are 

 found like tubercle bacilli, in the interior of giant cells. From a pre- 

 paration stained by Ziehl-Neelsen, logwood, and orange-i-ubin. x 50. 



Plate XXI. 



Fig. 1. — (a) A leucocyte containing the fungus in its earliest recognisable 

 form, (b) A large multinucleated cell containing the fungus in an early 

 stage with the club-form already visible, (c) A leucocyte containing a 

 small stellate fungus, (d) A large cell containing clubs arranged in a 

 small rosette, (e) A multinucleated cell with clubs arranged in a palmate 

 form. All the above are drawn from sections of actinomycotic tongues 

 stained by the triple method, x 500. 



Fie. 2. — A giant cell with large vesicular nuclei at the periphery, and in the 

 centre a fully formed rosette of actinomyces with a smaller growth within 

 a " daughter " cell. From a section of the tongue of an ox stained by 

 the triple method, x 500. 



Fig. 3. — A very large circular giant cell, with its ring of nuclei at the 

 periphery, enclosing several isolated tufts of actinomyces. From a section 

 of a nodule in the lung. Stained by the triple method, x 500. 



Fig. 4. — Three rosettes of actinomyces surrounded by a row of large, some- 

 what angular multinucleated cells. From a section of the tongue of an 

 ox stained by the triple method, x 430. 



DESCRIPTION OF PLATE XXII. 

 Bacillus tetani. 



Following p. 458. 



Fig. 1. — From a cover-glass preparation of a pure-cultivation of the tetanus 

 bacillus in broth; stained with Neelsen's carbolised fuchsine. x 1200. 

 Lamplight illumination. 



Fig. 2. — From a cover-glass preparation from the same source ; stained with 

 Neelsen's solution and methylene blue, x 1200. Lamplight illumination. 



