PRACTICAL PATHOLOGY. 



ON PREPARING AND MOUNTING PATHOLOGICAL SPECIMENS. 



VERY little need be said about preparing pathological 

 specimens, as most of the processes already mentioned 

 will apply equally well to morbid tissues. It is often 

 necessary to find out at once what a tumour or new 

 growth consists of, and for this purpose it is necessary 

 to examine the fresh tissue. In some cases this is 

 sufficiently hard to be frozen and sections made, while 

 in others a small portion can be teased out on a slide 

 and examined. 



This may give a rough idea of what the morbid 

 growth is composed, but for a thorough examination 

 and when it is desired to keep preparations of any 

 disease, a complete process of hardening must be 

 adopted, and sections cut and stained as in normal 

 tissues, and for this purpose it is necessary to have the 

 material as fresh as possible. 



To MAKE PERMANENT PREPARATIONS OF A CANCER IN A 

 SHORT TIME. 



This method may be applied to most of the sarco- 

 mata and carcinomata, and is valuable, as it can be 

 used on portions of morbid tissue excised from the liv- 

 ing body. Snip off a small portion of any morbid 

 growth, such as cancer, with a pair of curved scissors. 



H2 



