9 laboratory scales, electrical, scientific and testing equipment for laboratory use comprising attrition scrubbers for scrubbing, polishing and removing surfaces from solids, classifiers for fine sizing, desliming, grinding, regrinding, washing, dewatering and densifying, samplers, concentration tables for concentrating solids by size or weight, conditioners for conditioning pulps and for conditioning feed materials to filtering apparatus, crushers for crushing mineral, coal and chemical solids, mills for preparing laboratory samples, pulp density scales, sample splitters, samplers, sieves and sieve shakers, solvent extraction units, vanning plaques, vibrating screens, wet and dry feeders, wet and dry screen analyzers, magnetic separators, particle size monitors, refractory measurement units