Physics Instruments

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The medium weight, Welch type tuning fork, are intended for student use and for general experiment work. They are often selected for student use and preferred for laboratory standards and for applications requiring longer duration of vibration. The frequency in vibration per second and scale letters are pressed into the metal at the base of each fork. Supplied in a superior quality wooden box.

Superior quality, set of 8 tuning forks, chrome plated. The accuracy of the fork is adjusted with considerable care by skilled technicians. Supplied in velvet case.

Superior quality, set of 8 tuning forks, chrome plated, each tuning fork marked with its number of vibrations.

Made from soft wood, smoothly operating graduation upto 50 cm, provided with aluminium channel for smooth movement of the jaw.

Same as cat. No. 1277 B with least count of 0.001 cm. Supplied in velvet case.

Steel chrome plated model. One side graduated in inches for 6 inch and other side graduated in millimeters for 15 cm and the 10-part vernier reads to 0.1 mm. The moveable jaw can be held at any position on the scale by means of a spring contact. Fine adjustment can be made by means of a convenient thumb operated strip which is allowed to disengage for fast adjustment. Packed in velvet case. Least count 0.01 cm.

Same as cat. No. 1277 A but made from high quality stainless steel, (stainless steel calipers retain their appearance even after repeated use), packed in velvet case. Least count 0.01 cm.

Very superior quality steel chrome plated. The metric scale is graduated in millimter for 12 cm and the 10 - part Vernier reads to 0.1 mm. The english scale is graduated to 1/16 inch. For 5 inches and its 8 - part vernier reads to 1/28 inch with adjusting wheel and depth gauge. Elegantly packed in card board box, with detailed working manual. Least Count 0.01 cm.

The PSAW vertical reading microscope consists of a microscope with rack focussing adjustable vertical column. The stereotyped design of the vertical column moving through 15 cm by rack & pinion is now replaced by a superior quality vertical pillar carrying the scale with the entire 15 cm vertical lift by smooth rack & pinion, moving inside a heavy vertical column carrying the brass vernier. Vernier spring is loaded for precise apposition to the scale. A guide slot & key ensure up & down movement in the same plane. The stainless steel scale & vernier is machine divided to accuracy within 0.01% or better. The horizontal microscope tube is mounted on the vertical column, and is adjustable by smooth rack & pinion, through twin knobs on both sides. The microscope moves on the machined inter ground guides.

Same as above, smaller in size, has 24 aluminum discs instead of 18.

For demonstrating wave motion. Helical coil of flat section tampered steel wire. Coil dia 7.5cm length closed 10cm fully extended 3mt.

It consists of 18 aluminum discs supporting a series of iron nickel rods. On revolving the handle the motion is transmitted successively from one rod to the next, appearing as a wave traveling to the top and back. The movement of the waves can be observed. All metal parts are fitted on a superior quality polished wooden board.

A. 3” x 2” x ½ “
B. 4” x 2.5” x 1”

Made from an alloy of magnet, nickel and copper, with a low temp. Coefficient. This wire is particularly suitable for the construction of resistance coils etc. Or any application where accuracy of ohmic value is the important factor and electrical loading is low. Supplied in 100 gm packing only.

S. No.	SWG No. Dia. (In mm)
1)	20 0.71
2)	22 0.56
3)	24 0.45
4)	26 0.40

Soft nonmagnetic for laboratory use. Supplied In 100 gm packing only. SWG No. 22, 24, 26, 28, 30.