486 The Farmer's Veterinary Adviser. 



tissues as well as outward firom 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 contaiuing 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. Eecent simple tumors, stiU 

 largely cellular, may sometimes be removed by stimulat- 

 ing embrocations, as iodine ointment or tincture, cam- 

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

 reduced or even entirely removed by the occasional injec- 

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

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

 tumors the evacuation of the Uquid through a fine cannula 

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

 of iodine (one part of the compoimd 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 

 l)ermeate aU cell structures aHke and destroy them. Ni- 

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

 chloride 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 the 



