408 THE CORNEA, BY ALEXANDER ROLLETT. 



the corneal cavities, and the substance traversed by the fibrils 

 in which the cavities appear to be situated. The chemistry 

 of this subject, and especially of the mode of action of the 

 silver salt, cannot here be entered into in any further detail, 

 and none of the hypotheses respecting it are satisfactory. 



The demonstration recently made by Genersich,* that migrat- 

 ing cells may reach and move freely in the interior of the cavi- 

 ties of the cornea when these are rendered distinct by treatment 

 with nitrate of silver, is in accordance with the results of our own 

 observation. In similar accordance with ours are the researches 

 of Hansen,f who found that the corneal cavities underwent 

 changes corresponding with the alterations taking place in the 

 corneal corpuscles in inflammation. Whether at the periphery of 

 the corneal cavities something similar occurs to that which is 

 seen in the lacunae of bone $ and in the dentinal tubuli (dentinal 

 sheaths), which is supported by some observations, I do not 

 feel myself, from the paucity of my experiments, able to decide, 

 though I regard it as probable. 



Injection experiments play an important part in the views 

 entertained upon the structure of the cornea. (See Bowman, || 

 v. Recklinghausen,^ Leber,** C. F. Miiller,ft Schweigger- 

 Seidel,}} and Boddart. 



Boddart,|||| it appears, was the first who was successful in 

 filling the corneal cavities by puncture injection. Whether 



* Medicinische Jahrbucfier der Gesellschaft der Aerzte in Wien, Jalirgang 

 1871, p. 1. 



t Anzeiger der Gesellschaft der Aerzte in Wien, No. 3, 1871. 



I See this Manual, Vol. i., p. 124 

 See this Manual, Vol. i., p. 466. 



|| Todd and Bowman, Vol. ii., p. 19 ; Lectures, p. 13. 



IT Die Lymphgefasse, etc., p. 41. 



** Monatsblatter fur Augenheilkunde, 1866. 



tf Virchow's Archiv, Band xli., p. 110. 



JJ Loc. cit., et seq. 



Zur Histologie der Cornea, Centralblatt fur die Medicinische Wissen- 

 schaften, 1871, No. 22. This essay has fallen under my notice since this 

 sheet was corrected for the press. It has only caused me to alter the 

 immediately following paragraph. In other respects I must continue to 

 hold my own views. 



II II LOG. cit. 



