GENERAL DISEASES 151 
Fie. 16. Legs of cock showing lesions of articular gout. (Drawn from photo- 
graph by Hebrant and Antoine) 
surface of the digital region in the vicinity of the articulations. 
Because of interference with circulation the tumors have a grayish 
yellow color. Some of the tumors fluctuate and their appearance is 
suggestive of peri-articular abscesses. On incision the tumors are 
found to contain a whitish, creamy, pasty mass consisting of crystals 
of uric acid. The majority of the tumors are located in the peri- 
articular connective tissue and a small number communicate with the 
articulation. 
Gout produced experimentally. In order to determine what 
influence is exerted by protein on nutrition and the occurrence 
of gout, Kionka fed hens exclusively on horse meat that had been 
minced, and freed completely from fat. They were allowed to drink 
water as desired and soon became accustomed to the compulsory 
diet. Within a period varying from three to fifteen months they 
all became affected with gout appearing in three forms. 
In every case at first the gait became uncertain and difficult and 
the affected birds fell often while walking. In the first type of 
