US$ 30.00
the slim half-disc geometry letting beams enter the curved face along its radius for clean refraction-angle and TIR observations
deliberately using non-standard graduations to build empirical reasoning
Single-channel aluminum 1-meter bench with engraved graduations and leveling-screw feet
formed to measure atmospheric pressure through mercury or indicator-fluid column rise
and 400 ppm
Safety Goggles - Indirect Vent Type_Tall Form the slim half-disc geometry lettingGeneral purpose googles with side ventilators. General purpose googles with side ventilators. Designed to protect eyes from chemical splash and dust.
US$ 30.00
US$ 30.00
US$ 60.00
US$ 27.99
US$ 22.00
US$ 22.00
US$ 27.99