MAWSON & SWAN, 



Wire Gauze Cylinder, on insulated stand, with Ball, 8/6 



Bucket and Syphon, from which before being electrified the water 



drops slowly, but when electrified runs freely, 2 9 

 Egg Stand, for showing the passage of the electric spark through a 



column of eggs, 57- 



Figure Plates, for pith figures, 5/- and 7/6 

 Pith Figures, various kinds, from pd. each. 

 Fulminating Pane, a simple form of condenser, for giving strong 



shocks, 6/6 



Hand Spiral, 3/- and 3/6 

 Head of Hair, 36 

 Kinnersley's Thermometer, for showing atmospheric .disturbance 



caused by the passage of the electric spark, 12/6 

 Orrery, to illustrate the revolution of the moon round the earth, and 



of the earth and moon round the sun, 4/- 

 Phosphorus or Spirit Cup, 5/6 and y/- 

 Pith Ball Stand, 2/-, 3/-, and 4/- 



Pistol, for the explosion of mixed gases by the electric spark, 4 - 

 Thunder House, to show the effect of the electric discharge, 6 '- 

 Whirl, 2,-; Ditto, with revolving spiral, on stand, n/6 

 Words "Fire" or "Light," also various other devices on glass, in 



mahogany frames, 4 '6 and 6 '6 



MATERIALS FOR THE CONSTRUCTION 

 OF ELECTRICAL MACHINES, &c. 



Brass Balls- 

 Inch -| j -| f | T i^ i^ 2 cliam. 

 Price ad. 3d. 4d. 5d. 6d. 8d. lod. 13 2/- each. 



Brass Clamps for fixing apparatus to tables, &c., 36 each. 



Brass Conductors 5 6 7 8 10 inch. 



Price 3/- 3/6 4'- 56 9 - each. 



Brass Chain, per yard, 6d. 



Cement, Electrical, for cementing caps, &c., to glass rod, in tins, T/- 

 and 2/6 each. 



Cylinders, Glass 



Approximate 1 6 i 6 i x 4 ? x 5 8x5^10x6 11x7 inches. 



measures, j ^ 2 ^ / r l_ 



Price - - i/6 2 ; 6 3- 36 46 6/- each. 



13 and 15, Mos ley-street, Newcastle-on-Tyne. 



