F is for a Forgotten Furnace -- a 110+ year old steam boiler, to be specific! This F comes to you from the corner of the old Quincy Mine #7 boiler house, built in 1898.The darker rock is poor rock from the mine -- a great way to recycle your materials. The red quoins are made of Jacobsville Sandstone, a building material native to the Keweenaw (and commonly used in buildings). They sure don't make 'em like they used to! Does anyone else think that the lines, stripes, and swirls in the sandstone look a bit like close-ups of Jupiter? Check out my photo-a-day blog entry at Cliffs and Ruins! If you like my photos, please visit my photo store: David Clark Photography. © David Clark, all rights reserved.