HEEPES CIECINATUS. VESICULAR EINGWOEM. 149 



rays during the animal's exposure at grass had favoured the 

 development of the skin disease. The horse was housed, 

 bled, and purged, and in the course of three weeks was 

 restored to health. 



FUEUNCULAE EEUPTIONS. 



To the comparative pathologists this group of skin diseases 

 is of special interest. It includes the boils and carbuncles 

 which in man and animals vary in severity, from a simple 

 pimple to a fatal anthrax. This subject has been ably 

 handled by Dr Lay cock in^ a paper on the Pathology and 

 Treatment of the Contagious Furunculoid, published in the 

 Edinburgh Medical Journal for November, 1856. The 

 great difference between furuncular eruptions and those 

 already noticed in this work, is the depth of inflammation 

 and the loss of vitality of a portion of the true skin beneath 

 the surface ; the dead tissue is termed the core of the boil. 

 In stating the characters of distinction between furunculus 

 and anthrax, Mr Wilson says, " Furunculus is more prominent 

 than anthrax, but the latter extends most deeply into the 

 skin, and involves a greater breadth of the structure of the 

 derma. The colour of furunculus is a deep red, becoming, 

 as the disease advances, more or less dull and blueish ; that 

 of anthrax presents the same tints in a heightened degree, the 

 deep red is still deeper and darker, often approaching a ma- 

 hogany hue, and the blueish tint of furunculus becomes a deep 

 purple and livid tint in anthrax. The core, which is single 

 in furunculus, may be multiplied to twenty or thirty in an- 

 thrax, until the numerous openings formed on its surface for 

 the crust of the cores give it the appearance of a sieve or 

 colander. Lastly, the pain, severe in furunculus, is more 

 intense and more burning in anthrax." 



Boils and carbuncles occur very commonly on the lower 



