GRAVITY MIXER iK Being U cd on Tho TIit New tou A new to this part of or the tho world but ot of undoubted utility and value aluc has hall been set up on tho tIme ito oC ot the tho proposed Boston block opposite tho the Federal building It H is In I a J gravity con concrete concrete crete mixer ml I which docs does away aWl with tho Iho line of oC the time power machine now fo so com coin common mon here hero It consists of ot two hoppers set In the time top of ot n II frame Cromo with a a larger hopper beneath and a still sUII larger hop hopper hopper hopper per below olow that each being provided with a Rate gate The Tho apparatus Is 18 set with time the upper hoppers on a n level with the ground so that cement sand and small broken rock may be wheeled and 1111 dumped Into them Tho The dumping oC ot o oran ran material Is 15 In the order named the thA proper amount of ot water is III run In and then the gates are aro opened The material runs by b gravity Into the second hop hopper per por mixing Itself as n It runs When let l t tInto Into Inlo the lower hopper the mixing Is pretty complete K so f that thal when It Is run Into Inlo the wheelbarrows from tho the lowest hopper bapper the concrete Is all made The Tha concrete Is then distributed where de do desired sired aired The Tho upper hoppers are arc emptied alternately so 10 that while one lot la In gor tug Ing down another Is ia being got ready In tho the other oilier thus making the process ot manufacture continuous With tho the power mixers as roan cm as the tho material hISS has ha been hicen dumped Into tho thu mixer noth V v ln con cun hs he h done lono until the tho ma nan chine has ha churned Its lis contents and bu betm emptied and then It takes take liell ama aji engine to operate operal It