White Sandstone Specimen Chemical_Iodine Solution Replaces the top ring and

Replaces the top ring and four 12-inch pulley strings on the PH0347CN8 Standard Force Table

Twelve-position substitution box rotating through 100 ohms to 470k ohms at 1W and plus-or-minus 1%

the f/1 geometry favoring strong convergence and bright real-image formation in introductory refraction experiments

A solution of sodium hydroxide which is approximately 0

000 lux through a separate probe with a CIE photopic spectral response

White Sandstone Specimen Chemical_Iodine Solution Replaces the top ring andWell sorted rounded quartz sedimentary specimen indicating long transport and heavy erosion, hand selected for earth science identification and classroom collections.