Bell in Vacuum, Glass, DC Subcategory_Lab Burner Accessories Larger-spark 100mm induction coil from

Larger-spark 100mm induction coil from a 6-12V DC input with adjustable vibrator and base-mounted suppression capacitors

Fifty-turn 4A coil for the demountable transformer

Six-range AC/DC moving-coil voltmeter at 3/10/30/100/300/500V with a toggle for AC or DC mode

Half life-size circulatory system board traces arterial and venous pathways from heart to peripheral capillaries with numbered

Carbon anode-and-cathode pair pre-fitted in a rubber bung

Bell in Vacuum, Glass, DC Subcategory_Lab Burner Accessories Larger-spark 100mm induction coil fromBell in vacuum jar with a 4 6V electric bell suspended on rubber cord inside a 22 by 15cm glass chamber, illustrating that sound cannot travel without air.