

HISTOLOGICAL DEMONSTRATIONS. 79 



on a future occasion in sections of the lung, intestine, and 

 spleen. 



112; Mucous Tissue (H.) Examine a preparation 

 of vitreous humour, made by mounting a small piece of the 

 vitreous humour of the kitten before birth, in Farrants' 

 solution. Connective tissue corpuscles are seen in a jelly- 

 like matrix. 



CARTILAGE. 



113. White Fibro-Cartilage (H.) Make a section 

 with scissors of fresh white fibro-cartilage from the peri- 

 pheral part of the intervertebral disc of an ox or sheep 

 after hardening for forty-eight hours in a saturated solution 

 of picric acid. Tease with needles, and preserve in 

 Farrants' solution or in glycerine. 



The matrix consists of very delicate fibrils like those of 

 white fibrous tissue. Sometimes, however, it is so difficult 

 to see the fibrillation that one is apt to suppose that the 

 matrix is homogeneous. The cells consist of a nucleated 

 protoplast enclosed in a capsule, resembling that found 

 around the protoplasts of hyaline cartilage. The cells may 

 be found in various stages of fission. Their characters are 

 much more clearly seen with a power of 800. 



114. Yellow Fibro-Cartilage (H.) Place the epi- 

 glottis of a sheep for a day in rectified spirit : nothing 

 else hardens this so well. Make sections with a razor. 

 Examine, and preserve in Farrants' solution or in glycerine. 



This tissue consists of nucleated cells surrounded by a 

 matrix, which, in the greater part of the cartilage, consists 

 of a spongy material apparently of the same nature as 

 elastic tissue. Towards the periphery of the cartilage there 

 are distinct yellow elastic fibres in the matrix. But the 

 greater part consists of a yellow spongy substance, the fine 

 spicules of which when divided transversely resemble 

 granules ; hence the erroneous statement that the matrix 

 of this tissue consists of elastic fibres imbedded in a granular 

 material. It is advantageous to examine this tissue with a 

 power of about 800. 



115. Hyaline Cartilage, Trachea T. S. tracheal 



