Jolly's Photometer Build to Order these two-part polypropylene Buchner funnels

these two-part polypropylene Buchner funnels fit 11-12

designed to hold visible iron-filing field lines and support side-by-side magnet-strength comparisons in mechanics labs

Continuously motor-driven to supply a steady high-voltage source

letting students drive the lamp directly or send the slow AC output to a meter or oscilloscope

Solid glass friction rod that develops a positive electrostatic charge when rubbed with silk or wool

Jolly's Photometer Build to Order these two-part polypropylene Buchner funnelsBrightness comparing Jolly's photometer using a translucent paraffin disc method, the balanced position locating the photometric midpoint between two unequal light sources.