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To the other end of the pointer a plummet is hanged. Rack and pinion arrange mentis provide don the vertical rod for adjusting the height. Supplied with a chart showing relationship between "K and temperature of suspension of soils of varying specific gravity from 2.4 to 2.8 to help in solving stroke equation. Supplied complete with one Perspex plummet one measuring jar and one rider weight for zero adjustment and rider weight for adjusting the pointer to 100%.