794 



Magnetism. 



60 127. 1 : 6. 



60 129. 1 : 4. 



60130. 1:10. 



60,127. School Magnetometer, Figure, consisting of a School Galvanometer (see under), 

 a Resistance Bridge (see under), a Slider for taking magnets of any shape, a Stage for 

 the galvanometer and an Aluminium Bush, graduated, for taking annular weights of 

 each 20 g 



The apparatus are set up in the manner shown in the Figure. 



s. el. 



7. lo. o 



60,128. Slider, Stage and Aluminium Bush, alone 



60,12!). Magnetometer (Weber's), Figure (M. P. 10 th edn., IV, 1, Fig. 48; 9 th edn., Ill, 

 Fig. 91), for proving the intensity of terrestrial magnetism, with good plane mirror . 



1. in. o 



3. 15. 



60,130. Coulomb's Torsion Balance, Figure, for measuring magnetic forces and for 



experiments on electric attraction and repulsion (Gan.-Eein. Fig. 690). 3.15.0 



The following are supplied as accessories to the balance: (1) for experiments on magnetic repnl 

 -ion: 1 magnetic needle uiih Mand. 1 bar magnet for setting in the suspension l>n\\. 1 liar magnet 

 for deflecting the previous magnet, 1 brass bar of the same si/.e as llie first magnet. 2 brass rods with 

 knobs; (2) for the experiments nn electric repulsion: .'i ebonite rods with niekelled balls. - We give 

 complete description and directions for use with the apparatus from which the experiment- can be 

 made with ease and certainty. 



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9051, 



