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Refraction Block, semicircular, for Hodson Optical Kit
Refraction Block, semicircular, for Hodson Optical Kit,76mm dia x 12.5mm thick ..
Refraction Block, rectangular, glass
Refraction Block, rectangular, glass, 115mm x 65mm x 18 mm, all sides polished ..
Refraction Block, rectangular, for Hodson Optical Kit
Refraction Block, rectangular, for Hodson Optical Kit, 75mm x 50mm x 12mm ..
Refraction Block, isos. Triangle, for Hodson Optical Kit
Refraction Block, isos. Triangle, for Hodson Optical Kit, (45-45-90 deg), 82mm x 57mm sides ..
Refraction Block, equil. triangle, for Hodson Optical Kit
Refraction Block, equilateral triangle, for Hodson Optical Kit 60x60x60 deg, 57mm sides ..
Refraction block Snells Law
Point a diode laser through the clear acrylic block 30cm x 30cm to investigate the principles of ..
Refraction  Tank
Acrylic hollow tank with graduations,200mm diameter x 15mmm high ..
Receiver Adaptor, 46BU size, RA1/12
Receiver Adaptor, 46BU size, RA1/12,19/26,german glass ..
Receiver Adaptor, 27BU size, RA1/11
Receiver Adaptor, 27BU size, RA1/11,14/23 German glass ..
RCD (Circuit Breaker)
RCD (Circuit Breaker)portable on line type, 10amps, with 2 meter cable ..
Razor Blade, single edged
Razor Blade, single edged,safety razor,stainless steel, pkt/5 ..
Razor Blade, double edged
Razor Blade, double edged,safety razor, stainless steel, pkt/5 ..
Rain Gauge
Rain Gauge,plastic tapered 250mm ..
Rag, cotton,assorted colours
Rag, cotton,,1kg pack for cleaning purposes ..
Radiometer (Crooke's Radiometer)
Radiometer (Crooke's Radiometer) glass bulb mounted on glass stem and base ..
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