New England's golden age for natural lighting of houses occurred between 1875 and 1930. Central heating allowed for large rooms, higher ceilings and more windows.  This house is a sublime example of that golden age.  Facing west on one of Northampton's most prized addresses, it seems to absorb sunlight and cast it throughout the interior.  Inside, a combination of high ceilings, beautiful casework and  finishes appear to magnify the sense of domestic tranquility within.  Off the long and elegant living room is a marvelous full-length sunroom. Across the classic and generous stair hall is a large modernized kitchen and dining room with adjacent 1/2 bath. Upstairs, 4 varied and comfortable bedrooms each lit by large windows, are set across a wide and sunny hallway.  The expansive lot also has a 2-story garage w/ a dreamy, heated office/studio space w/1/2 bath on the top floor, perched amongst the trees.  The large backyard offers tranquil privacy. Showings begin at open house Sat.12-2pm.