Meter Scale, Vernier Calliper and Micro Meter Screw Gauge
Clip & Clamps
Boss Head, Mohr Clips and Retort Clamp
Necker burner, Spirit Lamp, Sand Bath, Deflagrating Spoon wire, Gauge Triangular Iron Wire, Retort Stand
Dip Circle, Magnetic Needle with stand and Dip Needle
The Dip Needle is a compass pivoted to move in the plane containing the magnetic field vector of the earth. It will then show the angle which the magnetic field makes with the vertical.
The needle must be accurately balanced so that only magnetic torques are exerted on it. Some texts suggest that the dip angle be measured twice, with the poles of the needle reversed by remagetization between trials, and the results averaged. Some instruments allow the needle and circle to be rotated to allow use as a compass.