Round Convex Glass Mirror, 50mm Diameter, 100mm Focal Length Light & Optics_Color this heavy-duty bosshead holds a

this heavy-duty bosshead holds a support rod and a perpendicular rod in a rigid screw-adjustable grip

with thermometer tubulure and glass manometer for calibrating thermometer upper fixed points under steam

Fine 40-60 mesh iron filings in a 100-gram sprinkle bottle

the smaller-tube counterpart to the 300x44mm standard rheostats with the same constantan-winding construction

Wood-based hydrostatic balance with two long pans and one short pan adjustable along a central column

Round Convex Glass Mirror, 50mm Diameter, 100mm Focal Length Light & Optics_Color this heavy-duty bosshead holds aConvex glass mirror at 50mm diameter and 100mm focal length, the diverging curvature widening the apparent field of view through virtual upright reduced images.