MAWSON & SWAN, 



Galvanometer, horizontal index, 3/6 and 6/- 



Do. do. with silvered dial, brass frame 10/6, 



nickel plated 1 1/6 



Do. do. with silvered dial, very delicate, i8/- 



Do. under glass shade, vertical index, 10/6 



Do. Lineman's (Pocket), for testing Telegraph Work or 



Electric House Wires, 3o/- 



Do. with suspended astatic needles, silvered dial, levelling 



screws, and glass shade, 4o/- (Fig. 107). 

 Do. do. do. very delicate, yo/- 



FIG. 107. FIG. 108. FIG. 109. 



Tangent Galvanometer, with 12 inch ring and silvered dial, 6$/- 



(Fig. 1 08). 



Mirror Galvanometer, for testing purposes, ^7 IDS. (Fig. 109). 

 Sine Galvanometer, large size, with circle divided to two seconds, 



,15 (Fig. no). 



ELECTRO -MOTIVE MODELS. 

 Electric Pump, for lifting water by means of the electric current 



(Fig. in), high-class finish, 32/6 

 Do., another make, 2y/- 



The same, with rod to revolve vacuum tubes at same time, 32/6 . 

 Engine with tube holder, 21 /- (Fig. 112). 

 Electric Mill, with wheel and grindstone (Fig. 113), -2 7/- 

 Electric Locomotive, with brass rails, on a mahogany stand, 6-3/- 

 Electric Zootrope, with various sheets of comic figures, 25/- 



13 and 15, Mosley-street, Newcastle-on-Tyne. 



