1885.] 



On the Structure of Hyaline Cartilage. 



173 



February 19, 1885. • 



THE TREASURER in the Chair. 



The Presents received were laid on the table and thanks ordered 

 for them. v 



The Chairman announced that a letter had been received from the 

 Elder Brethren of the Trinity House, in which, after mentioning the 

 experiments on lighthouse illumination which were being carried on 

 at the South Foreland, invitations were offered to any Fellows of the 

 Royal Society who may desire to witness the experiments, and stating 

 further that the Trinity Yacht would be available for observations 

 from the sea. 



The following Papers were read : — 



I. "On the Structure of Hyaline Cartilage." By George 

 Thin, M.D. Communicated by Professor Schafer, F.R.S. 

 Received January 29, 1885. 



(Abstract.) 



The author having previously shown (" Quarterly Journal of 

 Microscopical Science," vol. xvi — New Series), that a laminated 

 appearance is produced in hyaline cartilage by imbibition of nitrate 

 of silver, now shows that the same lamellated structure may be 

 observed in sections of fresh cartilage stained by Bismarck brown, 

 and that the lamellse, as brought under observation by both methods, 

 have approximately the same thickness and general arrangement. 



It seems certain that the matrix of hyaline cartilage is formed by a 

 series of lamellee superposed over each other, their general arrange- 

 ment being parallel to the free surface of the cartilage. 



Adjoining the zone of ossification, the lamella3 are seen to be very 

 distinctly separated from each other, and at this part their continuity 

 is interrupted by the large spaces which correspond to the position of 

 the cells. 



