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had been so adjusted as to eliminate reflections it was often difficult or iiupossible to get a clear and distinct iiuage of the electric filauient ujion the front of tiie lens. One could rearrange the condenser and the diaphragm and change the axis of fixation, and still the image would be clouded or obscured Cialis Generic Name and its outline distorted. The cause of the difficulty ap- peared to be that the light Cialis Generic Name was not adjusted at the best angle for the Cialis Generic Name purpose, and I was not always able to determine exactly what this was. As in the case of the reflections from the sides of the globe, it seemed to vary without a known cause. There were, however, angles of the axis of the globe which gave better images than others, although these angles could not be determined with exactness. I have labored with the light for two or three hours without finding the right angle. At other times the axis would remain unchanged for days, giving al- ways a clear, distinct image. It was interesting to note that there were angles of the line of the Hght to the eye at which a clear and distinct image Cialis Generic Name could be obtained from the iris, and none whatever from the front of the lens; also that with some adjustments no image could be ob- tained from the cornea, although the cornea is a nnich better reflecting surface than any other parr Cialis Generic Name of the eye. Wlien the adjustments were such that an image could be obtained from the front of the lens, however, one could always be obtained from the iris, or the front of the sclera, and sometimes from the cornea also. Distance of the light from the Cialis Generic Name obserz'ed eye. — Tlie distance of the light from the observed eye was very Cialis Generic Name important. Ily experiment it was found tliat when the lamp was adjusted at a distance of .sclera. Cm, concave mirror; 1 F, stand for forehead I'T ijhtaitnng an image on the »ije of the era; I., light, looo watts; P. plane mirror; eye; Cr. condcniwr; R. stand for chin rest; est; D, diaphragm. nearly sixty-five inches from the eye an image of a desirable size could be obtained on the front of the lens ; that is, it almost iilled the area of the moderately dilated pupil of a normal Cialis Generic Name eye. When the ligiit was brought closer, the image obtained in the pupil was too large, less clearly defined, and less bright, ^\'ith the light at a greater distance than sixty-iivc inches the image, although brighter 920 BATES: IMAGES REFLECTED FROM CORNEA. IRIS, LEXS, AND SCLERA. [New Y MpnirAt. Tn' and more distinct, was so small that it could not be so readily measured. The diaphragm. — The diaphragm was usually a ])iece of cardboard from two to six inches snuare, with a small Cialis Generic Name opening in the centre. The smaller the 0]5ening the more distinct the image, but it was also less bright than when the opening Cialis Generic Name was larger. When the opening was too large, or when the dia- phragm was not used at all, the image obtained was very cloudy and indistinct. An opening one eighth to a quarter of an inch in diameter was found to be the most satisfactory. If it were made smaller, so little light was thrown upon the front of the lens that no distinct reflection was obtained. The shape of the opening seemed to be immaterial, as good Fio. 5. — Images reflected from the anterior surface of the Cialis Generic Name lens. The images are located in the lower and outer quadrant of the pupil. To the left of each is an accidental reflection from the cornea which could not always be prevented. It often resulted from a slight tipping of the condenser. Below the pupil is a re- flection from the cornea produced by a thirty candle power lamp pLlced on the table to illuminate the eye while the photographs were bring taken. Note the absence of a corneal image of the fila- ment. The light was placed at an angle of ten degrees below the line of fixation and the subject regarded a concave mirror just above the condenser. The axis of the camera Cialis Generic Name formed an angle of ten degrees with the line of fixation. R, rest. Simultaneous retinosenpy indicated emmetropia. A, accommodation. Simultaneous retinoscopy indicated myopic refraction of 6.00 D. The photo- graiihs show no appreciable change in the size of the image, and no change was noted by the subject or the observer. Note the change in the corneal reflection which indicates a change in the position of the Cialis Generic Name eyeball during accommodation. Medical Jodrnal. results were obtained whether it was round, tri- angular, or square, regular or irregular. The dis- tance of the diaphragm from the light and from the eye was very important. By varying this, one could increase or diminish the size of the image, its Cialis Generic Name brightness or its distinctness. The closer it was placed to the eye, within certain limits, the smaller, more distinct, but less bright the image. Usually it was placed about forty-eight inches from the light. When brought closer than this, with a small opening, an image could be obtained on the front of the lens without the aid of the condenser ; but it was not sufficiently clear or distinct. It should be emphasized that changes in the Cialis Generic Name size of the open- ing, or in the distance of the diaphragm from the light, would alter very materially the size of the image reflected from the lens. The adjustment of the opening Cialis Generic Name in the diaphragm