Economy Hope's Apparatus Material_Cork Used to find resonance points

Used to find resonance points in an open air column by sliding the tube length against a struck tuning fork

while the cast iron anti-tip base keeps the unit upright on classroom benches

sized for the next step up from the 100uA meter when small-signal circuits exceed its full-scale deflection

001 inch with a friction roller and a lock mechanism for held readings

25 inches tall and 4

Economy Hope's Apparatus Material_Cork Used to find resonance pointsEconomy Hope's apparatus demonstrating the anomalous expansion of water near 4C as thermometers at different heights register densest water sinking while colder water rises.