Melde's Vibrating String Apparatus Chemistry_Molecular Model Sets and mammalian organ systems for

and mammalian organ systems for comparative vertebrate teaching

Open-frame demonstration DC motor exposing armature

Pocket-sized 45mm aluminum compass with a graduated dial

Dark-complexion life-size human torso with 13 removable organs including brain

the four-sided geometry letting students explore deviation through non-equilateral cross-sections

Melde's Vibrating String Apparatus Chemistry_Molecular Model Sets and mammalian organ systems forFor introducing standing waves, this Melde's vibrating string apparatus pairs an oscillator driven string with a mass tray that adjusts tension to determine wavelength, period, and amplitude.