KNABE GRAND SQUARE and UPRIGHT, *PI ANO * FORTES.^ FIFTY YEARS BEFORE THE PUBLIC. Upon tliolr oxaollonno alono liavo attalnoil an Uffl’Ult- OHASED PKE-EMINENCE, whloli establishes them as unequalled In TONE, WORKMANSHIP, TOUCH & DURABILITY. < U 2 Fifth Avenue, New York* Waukrooms :< Nos. 22 and 24 East Baltimore St reel, Haiti more, Mil. (No. 817 Market Space, Washington, !>. C. Heller d? Brislxtly, -:-Surveying Instrument Manufacturers,-:- • Ridge Avo. and Spring Garden St., l’hila., fa. Heller & llrlghtly’H InntrinnontH are used fur |>.irp»»en ..1 In- Columbia College (School of Mines ) Massachusetts College of Technology. Sheffield Sul. School of vale College. Western University of Ponna. Fish University Oregon Stale University. California State University. Dartmouth College. . Maine State College.