56 THE CONNECTIVE TISSUES, BY A. ROLLETT. 



part of the cell, is elliptical, transparent, and bounded by 

 a double contour line, or it may appear in the thickened 

 portion of the cell, indistinctly denned, and equably covered 

 with the granular mass. It may be noticed that such coarsely 

 granular cells are often connected by their apices in twos 

 and threes together. Besides the fusiform coarsely granular 

 cells, there may frequently be seen similar cells of more com- 

 pressed and rounded form. 



The finely granular cells are either provided with a distinct 

 oval and clear nucleus, or their contents may appear to be accu- 

 mulated at one point around a body resembling a nucleus. The 

 finely granular cells give off a variable number of processes 

 differing in their length and thickness; and these, radiating 

 in various directions, frequently join. When these finely 

 granular cells are long and carefully observed, slow changes 

 of form may be seen to occur ; such changes are, however, much 

 slower than those undergone by the migratory cells, and do not 

 lead to any remarkable change of place. In the same prepara- 

 tion, migratory cells are also frequently seen, and the difference 

 in the mode in which the movements are performed, as well as 

 other peculiarities of both forms of cells, may be easily ascer- 

 tained by direct comparison. The migratory cells are generally 

 smaller, and the addition of acetic acid brings one or several 

 small round nuclei into view, whilst all other cells, after the 

 action of acetic acid, present distinct nuclei of larger size and 

 more oval form. 



Kiihne has endeavoured ineffectually to excite movements 

 by means of electricity in the different kinds of cells he has 

 described. If we apply a large induction apparatus (brought 

 into activity by means of chromic acid and carbon, with a 

 primary coil of 160 turns, a nucleus of iron wire, and a 

 secondary coil of 6,245 turns, thrust quite home), and ex- 

 amine the effects of a few shocks, allowing a few minutes to 

 intervene between each, it will be seen that the cells with 

 finely granular protoplasm, withdrawing their finer processes, 

 contract gradually into round strongly granulated masses ; or 

 they may only retract their longer processes to a certain extent, 

 without causing them entirely to disappear, so that they become 

 knotty, whilst the body of the cell containing the nucleus 



