So. BO 134. 



Magnetometers. 



795 



60132. 1:17. 



60131. 1:7. 



60 134. 1 : 9. 



60 133. 1 : 10. 



00,1. '51. Apparatus as suggested by Fischer-Meutzner, Figure, for Coulomb's Law on 

 the Decrease of Magnetic Force with Distance (Ztschr. z. Ford. d. phys. U. 1885, p. 229) 



An astatic needle is suspended in front of a vertically placed bar magnet. The time of swing 

 is altered by approaching or removing the bar from the needle. 



OOJ.Hii. Luminous Needle (Friedr. C. G. Miiller's), for magnetometry and galvanometry 

 (Ztschr. f. d. phys. u. chem. U. 22, p. 1), Figure, with following accessories: short 

 magnet bar with lug and cap, 2 long steel wire magnets, 2 m long; 1 coil for Eemancnce 

 experiments with compensating winding and 4 test bars; 1 tangent galvanometer ring 

 300 mm in diameter; 1 idem 100 mm diameter; 1 multiplier frame; 1 astaticising 

 magnet; 1 wire figure in circular, square and triangular form for shewing a special 



of the Biot-Savart Law. 



The luminous needle has an excellent damping system 





s. d. 

 2. 0.0 



10.0 



133. Dynmeter (Friedr. C. G. Miiller's), Figure (M. T., Fig. 157), with a small bar magnet 



for same 100x10x6 mm, with agate cap, on stand . . . 2.10.0 



^0,134. Magnetic Balance (Kleiber's), Figure (Kleiber, Physik f. Gynm., Fig. 293) . . 1. 0. 



C'l. 5505. .-.Till. 

 5U5S, 4508. 



