THE CELL DOCTRINE. 45 



no doubt continuously made at the lower part of the 

 layer, by i which cells previously there are pushed 

 farther out.' 



" 83. The nuclei which various observers have 

 found lying among the fibres of various tissues, have 

 been considered by them as the ' remains of cells.' 

 This may have been the case, but so far from think- 

 ing with those observers, that the nuclei in question 

 were < destined to be absorbed,' I am disposed to 

 consider that they were sources from which there 

 would have arisen new cells." 



Without doubt, we can say, as did Goodsir,* in the 

 above by Martin Barry, we have the " first consis- 

 tent account of the development of cells from a parent 

 centre, and more especially of the appearance of 

 centres within the original sphere." Nothing more 

 definite, or directly to the point, could be desired, 

 and we think it may be justly said of Barry, that he 

 completed the expression of the cell theory inaugu- 

 rated by Schleiden and Schwann, in modifying the 

 mode of origin to conform to most recent observa- 

 tion. 



PROF. JOHN GOODSIR, 1845. 



In 1845, Prof. John Goodsir published his paper 

 on "Centres of Nutrition, "f in "Anatomical and 

 Pathological Observations," in which he clearly 

 grasped the two important principles of the modern 

 Cellular Pathology; first, the activity of these centres 



* Goodsir, Turner's Edition of Anatomical Memoirs. Edin- 

 burgh : 1868. Note on p. 390. 

 f Goodsir, op. citat., p. 389. 



