894 The Farmer's Veterinary Adviser. 



tissues as well as outward from the skin. It is slow to 

 implicate adjacent lymphatic glands, or to produce a con- 

 stitutional dyscrasia with internal deposits, and hence its 

 removal is much more frequently successful. Colloid Can- 

 cer is characterized by the formation of a mucous or gelat- 

 inous liquid contaiuiug a kernel of granules and rounded 

 simple or nucleated cells, enclosed in spherical cavities, 

 surrounded by a delicate membranous stroma, made up 

 of the former tissues of the part. Osteoid Cancer of ivory- 

 like hardness, with a vascular surface and interspaces, has 

 not been observed in the lower animals. 



Treatment of Tumors. Becent simple tumors, still 

 largely cellular, may sometimes be removed by stimulat- 

 ing embrocations, as iodine oiatment or tincture, cam- 

 phorated spirit, soap liniment, etc. Others may be greatly 

 reduced or even entirely removed by the occasional injec- 

 tion into their substance, through a very fine needle-like 

 tube, of discutients (weak solutions of iodine). In cystic 

 tumors the evacuation of the hquid through a fine cannula 

 or needle-like tube, and the injection of a weak solution 

 of iodine (one part of the compound tincture and three 

 parts water) will often succeed. But most frequently, 

 and especially in. old-standing tumors, resort must be had 

 to the knife or to caustics. Excision with the knife is the 

 quickest and usually the preferable mode, but in some 

 dangerous situations caustic may be preferred. Its em- 

 ployment is founded on the fact that it tends to eat away 

 the diseased mass sooner than the healthy ; but this par- 

 tial immunity of the sound tissues will not warrant the use 

 of such agents as caustic potassa or soda, which quickly 

 permeate all cell structures alike and destroy them. Ni- 

 trate of silver, chloride of zinc, sulphate of copper, ter- 

 cliloride of antimony, or the mineral acids, are usually 

 preferable. Protection against cold, ill-health arising 

 from other sources, mechanical injuries and exposures to 

 cold or wet are important elements in treatment. 



For cancers, an early and extensive removal with t!ie 



