Eureka/Constantan Bare Wire, Model D prop65 and a sprung jockey for

and a sprung jockey for null-point sliding contact

Features white enamel graduations every 50mL

with a captive thumbscrew on one prong for Melde's standing-wave experiment and binding posts accepting 2-6V DC

Rubberized vinyl halter-bib apron in medium

Greatly magnified transverse monocot stem section on a mounted base exposes scattered vascular bundle layout for advanced plant anatomy coursework

Eureka/Constantan Bare Wire, Model D prop65 and a sprung jockey forStable resistance 22 SWG bare constantan wire on a 125g reel, sized for resistance coils and thermocouple legs where copper nickel alloy holds its value across temperature swings.