9 laboratory scales, electrical, scientific and testing equipment for laboratory use in preparing samples 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 for use in the mining industry to screen process materials, vibrating screens, wet and dry feeders, wet and dry screen analyzers, magnetic separators, particle size monitors, refractory measurement apparatus