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energise and calm the body and mind in readiness for learning
The Philip Harris formula model sives student a simple
They can be used on grass
Made from multiple durable materials for long-lasting use
Decade Resistance Unit Age 4-5 energise and calm the bodyFor use as an accurate potential divider, ratio arm etc. This unit employs high stability metal film resistance elements having superior characteristics to traditional wire wound coils. It is equally suitable for a. c. or d. c. use. The individual decades are series connected, each having switched positions of 0 to 9, and are mounted in line with 4mm socket terminals linked to the ends of the chain. The top panel is clearly marked with the resistance