Fine adjustment is obtained by clamping the telescope carriage to a second rod, being raised or lowered by means of a micrometer screw fine adjustment, which reads to 0.05 mm. Attached magnifying lens is used to give accurate readings from scaled column. Such devices are used to measure small changes in height of substances or objects at reasonable proximity to the instrument. The micrometer allows fine scale adjustment of height of the telescope carriage and hence small variations in the levels of fluids in a column or extension or contraction of objects may be gauged. Front window is counterpoised and the side windows can be pulled back.
Case has two leveling screws and one bubble level.
External weights are required. Vemier is attached to permit fine readings down to 0.1 mg. For 100 g weight can discriminate to 1 part in a million. Both arms are divided into 10 major equal parts, subdivided again into a total of 100 parts. The rigid beam carries steel knifes that turn on an agate plate.