Word: six-inch
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...fill thirty quarto volumes. The preparation of these volumes occupies a large part of the force at the observatory in Cambridge. Besides this labor, a large amount of observation is done there, several instruments being kept in constant use. The largest of these are the fifteen-inch and six-inch equatorial telescopes, the eight-inch transit circle, the eleven-inch Draper photographic telescope, the eight-inch photographic telescope, and the meridian photometer...
...micrometrically, requiring constant use of the instruments. Nearly 4,000 photographs have been made, embracing the spectra of all the stars visible in Cambridge. Among the collection are a series of negatives, representing the condition of the sky for the past six years, and they are supposed to be the most complete set that exists. The six-inch telescope has been used for observing the variable stars and investigating photometric methods of observation. From the photographs taken in Peru it has been discovered that eight variable stars, in addition to the thirty previously noticed ones, have hydrogen lines, bright...
...between 50 degrees and 55 degrees north of the equator is mostly in print. A similar catalogue of stars between 10 degrees and 14 degrees south of the equator is at present in course of observation by Professor Searle and Mr. Dunne. Occasional observations have been made with the six-inch equatorial mounted in the west dome...
...artesian well can be done either by the job or by the foot. In the first case the sinker makes his estimate and bores until he finds water. The second method would probably be the most economical, as the cost is about two dollars a foot for a six-inch bore, which would supply all needs of the yard. The depth probably would not exceed fifty feet at the most, as there is a well near Church street which strikes water at forty feet. F. A. Kennedy, the cracker baker in Cambridgeport, supplies his extensive establishment with a six inch...