Decade Capacitance Box, Model F Graduations_Ungraduated panel-mounted with 4mm sockets and

panel-mounted with 4mm sockets and an enclosed earth connection for safe wiring during induction and AC demonstrations

supplying replacement bulbs for four-cell battery packs and the standard 6V ray-box and panel-lamp apparatus

hand-painted detail for blood-flow teaching

this seven-piece set traces fetal delivery from engagement through crowning to placental separation for labor and delivery teaching

Decade Capacitance Box, Model F Graduations_Ungraduated panel-mounted with 4mm sockets andUsed to substitute calibrated capacitance into AC circuits without rewiring, this decade box selects cascaded values for RC time constant, resonance, and frequency response student work.