with uniform benefit until finally after two hours constant work she could read Jaeger No. 1. During all this day she was able to see distinctly. The next day she was again unable to read but a short repetition of the same course brought her vision back again. There was no return of the blindness after that except occasionally for a short time at intervals of two or three days. In the course of ten days all trace of the difficulty had passed by and since has never returned. This case was diagnosed as one of genuine hysteria and not one of simulating blindness or malingering, and is reported as the most marked case I have ever had illustrating the effect of hokus pokusing (to call it by a mild name) which produced such a strong mental impression that the patient lost sight of her own peculiar mental condition, and by which a perfect cure was effected. To her the blindness was real, and her friends feel that a remarkable cure has been performed. Such a blindness can occur in any nervous hysterical patient, while simulated blindness usually occurs in those who wish to avoid service in the army or navy, or in the case of lazy young people who do not wish to study at school or college, and in those who have received a slight injury and wish to make it appear more serious for the sake of obtaining large damages, either from private individuals or corporations. For its detection there are several methods which are usually sufficient to give us positive proof that the blindness is not real. Von Graefe placed a number eight or ten prism in front of the eye, with the base upwards, downwards or sidewise, and if strabismus is present before the removal of the prism there is binocular vision. Juler places spectacles with an opaque glass in front of the good eye, when, if the patient can read, he must see with both eyes; or he places concave 20 before the good eye, when if the patient can read fine print he must see it with the other eye. Juval places a ruler before the eye so as to cover part of the page to be read, when, if one eye is blind, not all the page can be read. Mittendorf puts atropine in the good eye, when if the patient can read fine print he is not blind with the other eye. Wells places a prism in front of the supposed blind eye, and notices whether the apis of vision of that eye changes when the prism is removed. Bull bandages the good eye and places a prism in front of the other eye, and holds a lighted candle before the eye, and if the eye turns as the prism is turned, the eye is not blind.