Morse Sounder Glassware_Glass Bottles each foam-protected in a wooden

each foam-protected in a wooden case with frequencies labeled

spinal cord

the larger geometry pushing pole separation wide enough that field lines extend visibly beyond the magnet body for filing maps

Hardwood 25-slot slide storage box safely holds standard microscope slides for small-collection organization and lab bench storage

sized for the positive-rail side of color-coded bench wiring

Morse Sounder Glassware_Glass Bottles each foam-protected in a woodenUsed to receive Morse code signals as audible clicks, this electromagnet driven pivoted arm sounder on a wooden base produces the snap of early telegraph operation when current pulses the coil.