34 



MAWSON & SWAN, 



Electric Tilt-hammer, 2y/- 



Barlow's Rotating Wheel, for showing the mutual attraction and 



repulsion of galvanic currents and permanent magnets, 75.; 



superior, i8/- 



A variety of other patterns. Every novelty as introduced. 



OTHER APPARATUS FOR SHOWING THE 

 PHENOMENA OF VOLTAIC ELEC- 

 TRICITY. 



FIG. 115. 



Ampere's Stand, with solenoid, circle, and rectangle, simple form, 



24/-; best finish, 5o/- (Fig. 115). 

 Apparatus to show the Currents of Electricity produced in a copper 



disc rotating between the poles of a magnet, 31/6 

 Apparatus to illustrate the construction and phenomena of Induction 



Coils, 3o/- (Fig. 1 16). 

 Bent Wire, capable of rotating about an axis in its own plane, to 



show the mutual action of electric currents, 8/-; better finish, io/- 

 Bobbin of Wire, to show induction by magnets, 6/- 

 Chain.of alternate links of Platinum and Silver, to show the unequal 



heating effects of a current of electricity in the two metals, 



i ft. long, links i in., 2/6 ; 3 ft. long, links 3 in., 6/- 

 Discharger or Table for Experiments with Rhumkorff's Coils, 8/- 

 Discharger, Henley's Universal, with holders for carbon \ 



electrodes, i8/- > Sec page n. 



Do. do. more complete, 257- ) 



Faraday's Apparatus, for electro-chemical decomposition, 10/6 and 15;'- 



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



