Parallelogram of Forces Apparatus with Pulleys and Weights, 26" Lab Supplies_Lab Burner Accessories Acrylic bell-in-vacuum jar with an

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

lets students compare how line density per unit length controls the spacing of the resulting interference pattern

this adjustable board accommodates specimens for butterfly

ventricles

Parallelogram of Forces Apparatus with Pulleys and Weights, 26" Lab Supplies_Lab Burner Accessories Acrylic bell-in-vacuum jar with anParallelogram of forces apparatus on a 26 by 20 inch wall mountable board with two clamp on pulleys, iron nickel plated hangers, and twelve 50g slotted weights for vector addition work.