Lichen. Heat Papules. Prickly Heat. 509 



a specific : sulphur iodide i part, sublimed sulphur 7 parts, cod 

 liver oil 7 parts. This is applied once and repeated at the end of 

 ten days, if necessary. Application is made to the whole skin 

 healthy and diseased alike, and rarely requires to be repeated. 



Ichthyol is commended by Mxiller in cases which show great 

 cutaneous thickening with cracks and fissures. It may be made 

 with water Ci : 5) or in glycerine or lanolin of the same strength. 

 Miiller combines it with lime water and olive oil and applies it 

 daily. 



Other agents in use are salicylic acid in olive oil (i -.3) : chry- 

 sarobin in paraffin ointment (1:4): naphthahn or naphthol 

 (i : 10) : resorcin in water (2 : 100). 



I.ICHEN. HEAT PAPUI.ES. PRICKLY HEAT. 



Horses, cattle, sheep and dogs suffer in hot season or hot stables. Ner- 

 vous temperament. Delicate skin. Over-driving. Heating foods. Cold 

 water when heated. Unwholesome food. Indigestion. Chronic affections 

 of stomach, liver, kidneys, etc. Symptoms : Clusters of small papules on 

 neck, back, croup, or thighs, crest, tail, exudate concretes, lifts hairs from 

 follicles, depilation in round spots, or patches, abrasions, ulceration, corru- 

 gated skin. Diagnosis : sudden eruption, its isolation, subsidence on the 

 coming of cold weather, and reappearance with the hot, intense itching. 

 Treatment : As in eczema. Protect against friction, give shade, and spray 

 with cold water. 



Under this name has been described a papular erruption occur- 

 ing in horses, cattle, sheep and dogs in the hot season, but also 

 occasionally, in winter, in hot, confined stables. 



It is seen especially on the neck, back, croup and thighs, is 

 common in fine bred horses with delicate skins, and nervous tem- 

 perament, and is pre-eminently a disease of hot weather. Over- 

 driving, heating food, a drink of cold water when heated or indi- 

 gestion connected with unsuitable food may be the occasion of its 

 irruption or tend to perpetuate it. In the same way different 

 chronic affections of the stomach, liver, kidneys or other organs 

 may be causative factors. 



Symptoms. The affection usually begins with a few minute 

 papules, isolated or in clusters, which dry up into scales or crusts. 



