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unclear instantaneously by means of electricity. I applied for a patent under the following specifications: (thought I had them, but was mistaken). The great expense of the boy, however, prevented me from deriving any benefit from the invention. I also wrote an article occasionally for a weekly. During the fourth year I invented the use of blue glass in cutting off the non-artistic? rays of light rom daguereotype plate during its exposition? in the camera, permitting the artistic rays? by entering. The almost impossibility of obtaining a daguerreotype impression in tropical countries led to the invention. Mr. Catherwood, the artist, had been to unclear for the purpose of taking views of the ancient ruins scattered over that country, but had returned unsuccessful. This set me to work experimenting and I found that by placing a piece of blue glass in the nozzle of the object glass the difficulty was overcome. I, therefore, arranged a camera in this way for him and with it he accomplished his object at a second visit. In addition to this I rewrote and published a second edition of my "Art of Photography, and issued a circular in November for the publication of a monthly Journal to be devoted to the "Art"-and all this time I abated not one job or title? in my duties to Mr. A- while he afforded me every facility for prosecuting these outside speculations. Indeed they were for his benefit more than for mine.