1513. Spot Reflecting Galvanometer
With built in Lamp & Scale. The overall window is about 180 mm long, the scale is conveniently arranged at an angle of 45 degree and is subdivided uniformly in to 100 divisions to a length of 150 mm.
The zero adjuster provided at the top, allows the spot to be set at any point on the scale. Fitted with built in transformer operatable on 220 volts AC mains.
Pointer knob is provided at the top for clamping and releasing the coil while in transit and in use.
Resistance= 100 ohms. approximate.
Sensitivity=4 to 5 microamperes per 75 mm of deflection. Complete with Shur.t. Workable on 220 Volts AC.

1514. Demonstration Tangent Galvanometer
With ring of 12" dia. having 9 coils of diff. dia. copper wire one side. With compass box.

1515. Stewart and Gee's Apparatus
To show variation of magnetic field along the axis of a coil, with compass box. Having two different turns 100 and 500 on an Aluminium bobbin (ring), fixed on wooden base fitted with a removable magnetometer graduated wooden base. The base is fitted with levelling screws.

1516. Stewart and Gee's Apparatus
To show variation of magnetic field along the axis of a coil as described above but the bench is made of all non-magnetic metal. A beautiful & most durable App. with compass box.

1517. Helmholtz Galvanometer
With two coils exactly alike and parallel to each other so connected that current passes round them in the same direction. The coils increase the uniformity of the field at the middle and thus make it more sensitive, with compass box.

1518. Dip Circle simple form
Fitted in a glass case. A circular scale in wooden box graduated in degrees is attached to the pillar having the needle. A pointer is provided for reading the scale on the wooden base with levelling screws.

1519. Standard Dip Circle
Comprising an extra sensitive magnetic needle mounted on practically frictionless bearing and moving in vertical plane over an engraved vertical circular scale on which both ends of the needle can be read. It is enclosed in a metal case, and can revolve about its vertical axis on a metal base provided with a circular horizontal scale and three screws and with agate jewel bearings.
 

1520. Deflection Magnetometer
All metal-bars bed with graduation. Compass box moves in a cradle on bar. Two separate cradle are provided for magnets.

1521. Vibration Magnetometer
Consisting of a polished box having sliding glass doors with levelling screws. The stirrup holding the magnet is suspended by a silk fibre attached to a cap on the glass tube which is fitted on the box. The swing of the magnet is observed through the slit. Complete with one bar magnet and one brass bar of the same dimension, all metal fittings brass.

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