J. A., V-para, aged 40, seven months pregnant, was first seen by the writer on June 5, 1901, in consultation with Dr. C. T. Sweeney at the Montana Deaconess Hospital. Her history showed that on May 28 and 29 last she had driven into Great Falls from her ranch fifty miles distant, sleeping the intervening night in her wagon on the road. On the 30th and 31st she had worked very hard re-papering a house occupied by her husband, who worked in the city as a plasterer, while June 1 was spent in purchasing supplies to take back to the ranch, which necessitated nearly the whole day's walking about or standing in stores. About midnight on the latter date she was awakened by a series of griping pains in the lower abdomen, and called Dr. Sweeney, who reports that the pains, while severe, were unattended by any symptoms of shock,