10 



MAWSON & SWAN, 



LEYDEN JARS, J pint, 2/6 ; i pint, 3/6 ; 2 pint, 5/6 ; 4 pint, io/- 



LEYDEN JAR BATTERIES, consisting of combinations of Leyden Jars, 

 in tray, with connecting rods s. d 



Set of four, about a pint each, French make, jars or bottles, 

 with narrow mouth ; the inside coating is gold leaf 

 loosely piit within 



Set of four, pint size, in tray, English pattern (Fig. 75) 

 Set of six, do. do. do. 



Set of four, quart do. do. 



Set of six, do. do. do. 



Set of six, 4 pint do. do. 



3 6 



FIG. 75. 



LEYDEN JAR, with movable Coatings to show that the charge is not 

 in the coatings, 6/6. Do., do., superior form, 10/6 



LEYDEN JAR, diamond spotted, pint size, $/- ; quart, 8/- 



CONDUCTORS. 



Conductors of 3 different forms cylindrical, conical, and spheri- 

 cal, made of wood covered with tinfoil, and fitting on the 

 stand,'"" 6/- 



Cylindrical Conductor, made of polished brass, with glass 

 insulating support and iron foot, 14/6 



Spherical Conductor, made of polished brass, 5-111. diameter, 

 mounted on a glass insulating support, with foot, i6/- 



INSULATORS. 



. '' Insulating Table Stand, with hollow glass support, 8 in. high, 



and capable o'f being raised to 13 in., 4/6 

 Insulating Table Stand, superior make, with loaded foot, .7/6 

 Insulator of Gutta Percha, 12 in. square, -^ thick, 5/- 



Insulating Stools of Black Wood, on four solid glass legs, 5/6 

 Do. do. of polished mahogany, 7/6 



Set of Glass Feet for Stools, 3/- 



13 and 15, Mosley-street, Newcastle-on-7yne. 



