Observatory Addition Started.

Final plans have been made for the addition to the brick building which contains photographic negatives at the Observatory, and the work of construction began yesterday. The building contract has been given to H. A. Bellamy & Co. of Boston, and the cost of construction will be about $7,000. The extension will be thirty-four feet long, twenty-nine feet wide, and thirty-four feet high and will contain seven rooms. There will be no basement, but the building will rest on a specially constructed concrete foundation. No wood is to be used in construction, except in the doors and windows, so that the building will be entirely fireproof. It is expected to have this addition finished by the first of next August. When it is completed, the available space for storing photographic negatives and valuable books at the Observatory will be about doubled.