Knowing as I did the power of the yellow and orange light to act upon the system directly, I concluded at once that it must have the power of so charging other substances that they would act upon the system in the same way, and as ordinary lamp light and gas light abound in the yellow-orange principle of carbon, etc., I was confident that they might be used with yellow glass to good advantage.
Having been costive for a few days I held a small half-ounce amber colored vial of water close to a kerosene lamp for 7 minutes, before retiring, and then drank it. In the morning I had two gentle passages without any pain, and for weeks experienced no return of costiveness. This is a good example to show the enduring character of the cures wrought by the finer elements.
