Visiting the gallery of Mr. Whipple, then in Washington Street, the busiest thoroughfare in Boston, I was struck with the very large collection of Daguerreotype portraits there exhibited, but particularly with a large display of Daguerreotypes of the moon in various aspects. I had heard of Mr. Whipple's success in Daguerreotyping the moon before I left Europe, but had no idea that so much had been achieved in lunar photography at that early date until I saw Mr. Whipple's case of photographs of the moon in many phases. Those Daguerreotypes were remarkable for their sharpness and delicacy, and the many trying conditions under which they were taken. They were all obtained at Cambridge College under the superintendance of Professor Bond, but in what manner I had better allow Mr. Whipple to speak for himself, by making an extract from a letter of his, published in _The Photographic Art Journal_ of America, July, 1853. Mr. Whipple says: "My first attempt at Daguerreotyping the moon was with a reflecting telescope; the mirror was five feet focus, and seven inches diameter. By putting the prepared plate directly in the focus of the reflector, and giving it an exposure of from three to five seconds, I obtained quite distinct impressions; but owing to the smallness of the image, which was only about five-eighths of an inch in diameter, and the want of clockwork to regulate the motion of the telescope, the results were very far from satisfactory. "Having obtained permission of Professor Bond to use the large Cambridge reflector for that purpose, I renewed my experiments with high hopes of success, but soon found it no easy matter to obtain a clear, well-defined, beautiful Daguerreotype of the moon. Nothing could be more interesting than its appearance through that _magnificent_ instrument: but to transfer it to the silver plate, to make something tangible of it, was quite a different thing. The "governor," that regulates the motion of the telescope, although sufficiently accurate for observing purposes, was entirely unsuitable for Daguerreotyping; as when the plate is exposed to the moon's image, if the instrument does not follow exactly to counteract the earth's motion, even to the nicety of a hair's breadth, the beauty of the impression is much injured, or entirely spoiled. The governor had a tendency to move the instrument a little too fast, then to fall slightly behind. By closely noticing its motion, and by exposing my plates those few seconds that it exactly followed between the accelerated and retarded motion, I might obtain one or two perfect proofs in the trial of a dozen plates, other things being right. But a more serious obstacle to my success was the usual state of the atmosphere in the locality--the sea breeze, the hot and cold air commingling, although its effects were not visible to the eye; but when the moon was viewed through the telescope it had the same appearance as