No. 61321. 



Reflecting Galvanometers. 



879 



61 310. 1 : 6. 



61 311. 1 : 6. 



61 316. 1 : 8. 



61 320 A. 1:3. 



61 320 B. 1:3. 



01.310. Nernst Lamp, Figure, with Condenser and Projection Lens, for projecting the \ & d. 

 diaphragm placed in front of the condenser on to the scale; for 110 220 volts Direct i 

 Current only, with wall bracket j 5. 0. 



50. 121. Terminal Board with 3 terminals on serpentine base, for fixing on the wall, also 7 metres 

 triple flexible cord and 6 porcelain cylinders, for Galvanometers Nos. 01,302, 01,304, 

 61,300 ' . 0.12.0 



61,317. Terminal Board with 2 terminals and triple flex, as No. 50,121, for Galvanometers 



Nos. 61,303, 61,305, 61,307 j 0. 10. 



01.320. Shunt for Reflecting Galvanometers, Figures A and B (W. D., Figs. 510 and 511 

 [483 and 484]), consisting of a resistance box with resistances of 3 / 7 "', Vg"'? 3 /97 lhs > 1 /99 tll > 

 3 /997 ths V999" 1 ) 3 /9997> ' /9999 1 " value of the galvanometer resistance, for enabling 

 0.3, 0.1, 0.03, 0.01, 0.003, 0.001, 0.0003, 0.0001 of the current to be. measured to be 

 passed through the galvanometer 2. 14. 



When ordering the resistance of the galvanometer coil for which the arrangement is intended 

 should bo given or the coil sent to us. In galvanometers having two coils the shunt is usually wound 

 for the high resistance coil. 



61.321. -- idem, smaller, for shunting 0.1, 0.01, 0.001 and 0.0001 of the current to be 



measured 



2. 6.0 



50,118. Bracket for Reflecting Galvanometers, Figure 50,118, p. 21. Price without Gal- 

 vanometer and Scale 0. 8. 



It is preferable to set up the instrument on a bracket fixod to the wall if space permits rather 

 than on a suspended board fixed to the ceiling as the vibrations of the ceiling have a disturbing action 

 in many cases. 



50,119. Suspended Board for Reflecting Galvanometers, Figure 50,119, p. 22, with nickelled 



brass rods and polished board. Price, excluding Galvanometer 



50,112. Galvanometer Scale, 4 m long, painted on linen, divided in decimetres, the metres 



figured, for fixing to the wall 



1. 10.0 



0. ]2.0 



50, 123. - idem, 6 m long ! 0. 16. 



CI. IS'-', 2330, 2332, 

 2333, 2334. 



