FORMATION OF TISSUE. 45 



specimen to a very incomplete examination, 

 and have found that physics will not fully 

 account for any of the facts revealed by* observa- 

 tion. I might further describe the wonderful 

 structure of the beautiful ganglion cells repre- 

 sented in Plate I and Plate II, figs. 2 and 3, 

 by which the rythmic contraction of the mus- 

 cular fibres is effected, and with which the 

 nerve fibres are continuous, but by so doing I 

 should probably tire the reader with too many 

 minute details. The conclusion, however, 

 already deduced would again be arrived at, 

 that neither the structure, nor the arrangement, 

 nor the position, nor connections of these 

 little nerve organs could be accounted for by 

 physics, nor their composition or action ex- 

 plained by chemistry. Not even the connec- 

 tive-tissue-corpuscles have been formed by 

 force, nor do they grow or act by physics and 

 chemistry. 



Every particle of tissue, represented in the 

 drawings, is the result of changes which have 

 occurred in previously existing living matter. 

 The evidence of the origin of the tissue is as 

 distinct and certain as that which leads us to 

 conclude that the formation of the lifeless shell 



