1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods this decade box selects cascaded

this decade box selects cascaded values for RC-time-constant

Center-zero galvanometer reading 1-0-1mA at plus-or-minus 2

Hand-painted dicot root transverse section model exposes epidermis

Aluminum-cased plotting compass with a glass face and a dial marked with principal points

providing a stable heating platform for introductory chemistry and general science classroom work

1A DC Interchangeable Dial for Demonstration Meter Metal Labware_Metal Bases & Rods this decade box selects cascadedOne amp AC scale on a 315x115mm laminated panel with sealed shunt, dropping into the demonstration meter as a 0 1A AC ammeter for transformer and household current measurements.