443 



2 drams carbonate of potash and 2 grains of cyanide of potassium in 

 a quart of water Avill sometimes Ijenelit. If due to pin worms in the 

 rectum, tlie itching- of the tail may be remedied bj" an occasional 

 injection of a quart of water in which chips of quassia wood have 

 been steeped for twelve hours. 



HERPES. 



This name has been apj)lied to a disease in whicli there is an erup- 

 tion of minute vesicles in circular groups or clusters, with little tend- 

 ency' to burst but ratlier to dry up into fine scabs. If the vesicles 

 break they exude a sliglit, gummy discharge which concretes into a 

 small, hard scab. It is apparentlj- noncontagious and not appreciably 

 connected with an}" disorder of internal organs. It sometimes accom- 

 panies or follows specific fevers, and is on the whole most frequent at 

 the seasons of changing the coat — spring and autumn. It is seen on 

 the lips and pastern, but may appear on any part of the body. The 

 duration of the eruption is two weeks or even more, the tendency 

 being to spontaneous recovery. The affected part is very irritable, 

 causing a sensitiveness and a disposition to rub out of proportion to 

 the extent of the eruption. 



It may be treated hy oxide of zinc ointment, and to relieve the irri- 

 tation a solution of opium or belladonna in water, or of sugar of lead 

 or oil of peppermint. A course of bitters (one-half an ounce Peru- 

 vian bark dailj* for a week) may be servicable in bracing the system 

 and i^roducing an indisposition to the eruption. 



BLEEDING SKIN ERUPTIONS — DERMATORRHA(iIA PARASITICA. 



In China, Hungary, Spain, and other countries horses frequently 

 suffer from the presence of a thread worm {Filar ia hceuiorrhagira, 

 Railliet: F. muUipapnllosa, Condamine, Drouilly) in the subcuta- 

 neous connective tissue, causing effusions of blood under the scurf 

 skin and incrustations of dried blood on the surface. The erup- 

 tions, which appear mainly on the sides of the trunk, but maj' cover 

 an}' ijart of the body, are rounded elevations about the size of a small 

 pea, containing blood which bursts through the scurf skin and con- 

 cretes like a reddish scab around tlie erect, rigid hairs. These swell- 

 ings appear in groui^s, which remain out for several da^'S, graduallj- 

 diminishing in size; new groups appear after an interval of three or 

 four Aveeks, the manifestation being confined to three or four months 

 of spring and disappearing in winter. A horse will suffer for several 

 years in succession, and then permanently recover. A fatal issue is 

 not unknown. To find the worm the hair is shaved from the part 

 where the elevations are felt, and as vSoon as a bleeding ijoint is shown 

 the superficial layer is laid open with the knife, when the parasite 

 will be seen drawing itself back into the i^arts beneath. The worm is 



