Polarizing Filter Stress Demonstration Apparatus Glass Color_Transparent Life-size heart model opens into

Life-size heart model opens into two halves to expose four chambers

a battery-free source of partial vacuum for bell-jar demonstrations without external power

3mm inner diameter for blood sample collection and laboratory analysis procedures

packaged with a keeper that bridges the poles to keep the field intact between sessions

Student kit for constructing a working DC motor from component parts

Polarizing Filter Stress Demonstration Apparatus Glass Color_Transparent Life-size heart model opens intoBuilt to reveal stress fringes in transparent solids, this apparatus pairs two 8 inch polarizing filters in a wooden frame with four acrylic shapes that show photoelastic patterns when squeezed.