In a case of costiveness at my office, during the month of June, I let the sunlight pass through some yellow-orange glass of a hue which is usually termed yellow, and over which I had placed a lens to concentrate the rays the better at certain points. I gradually moved the focus of the yellow light over the whole bowels but especially over the descending colon on the left lower side. Commencing at 2 P.M., I continued the process for 10 minutes. The perspiration was started over the whole body, although the thermometer stood at only 70° F. In 5 minutes after receiving the light, the bowels commenced the rattling motion similar to what is experienced with physic, and in 18 minutes a gentle passage was caused, and that wholly without pain. Some persons would require 2 or 3 times as long an application as the above. I have caused the same results with the chromo-disc to be described hereafter. Any deep yellow glass would act in the same way, but the yellow-orange hollow lens which the author has devised is more prompt and effective than any other instrument, and charges the water within for internal use while it is being used externally.
