172 PRACTICAL HISTOLOGY. 



CHAPTER IX. 



LYMPHATIC AND SEROUS MEMBRANES. 



IT is in preparations of the serous membranes that 

 the structure and arrangement of the lymphatic ves- 

 sels can be best demonstrated, and it will on this 

 account be convenient to combine them here under 

 one head, especially as the method which on the 

 whole exhibits the structure of the serous mem- 

 branes best is the only one which shows at all satis- 

 factorily the structure of the lymphatic vessels and 

 their relation to the cell-spaces of the connective 

 tissue. 



Preparations 1, 2, and 3. Preparation of the 

 rabbit's omen turn. A rabbit having been killed 

 by bleeding, the abdomen is opened, and the omen- 

 turn, which is generally to be found crumpled up 

 close beneath or to the left of the stomach, is raised 

 with forceps, cut off as close to the line of attachment 

 to the stomach as possible, and placed in a shallow 

 dish of salt solution which is at hand to receive it. 

 Besides this salt solution there should be ready on 

 the table a little one-half per cent, solution of bichro- 

 mate of potash in a bottle, some one-half per cent, 

 solution of nitrate of silver, a wash-bottle of distilled 

 water, a flat glass dish containing a mixture of spirit 

 and water (equal parts), two glass plates about four 

 inches by six, a large soft camel-hair brush, and two 

 or three clean capsules and watch glasses. 



Two small corners are first to be cut off the omentum. 

 One of these is placed in the bichromate of potash, 

 put aside, and examined after two or three days; this 

 is for exhibiting the arrangement of the connective 

 tissue fibres. The other is first rinsed with distilled 



