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To the Editor:—
The difficulties of getting sufficient light for the taking of clinical photographs of dermatologic interest, which is feasible for office use, led me to try the air cooled mercury quartz lamp, which has become a fixture in almost all dermatologists' offices. My success has far exceeded expectations. I have not found any source of light which approaches it in intensity, and, except for the wearing of the protective goggles, gives as much ease of manipulation and is as free from objectionable features. Speed of exposure, which is a necessary factor for good photographs, is assured with the lamp. The lens may be stopped down, which aids in giving depth to the picture. There is no attendant explosion, and no smoke to upset the office or to make further stay in the room impossible for more pictures or other purposes. (If a smoke bag is used, light is