Round Convex Glass Mirror, 50mm Diameter, 100mm Focal Length Light & Optics_Color Fine 40-60 mesh iron filings

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

including a digital multimeter and oscilloscope

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

Brass-knife single-pole single-throw switch on a durable plastic base

Round Convex Glass Mirror, 50mm Diameter, 100mm Focal Length Light & Optics_Color Fine 40-60 mesh iron filingsConvex glass mirror at 50mm diameter and 100mm focal length, the diverging curvature widening the apparent field of view through virtual upright reduced images.