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Scientific instrument manufacturers, of New Eltham, London, SE9
1845 Messrs. George Heath was founded.
1863 His son, George Wilson Heath, was apprenticed to the business
1870 George junior completed his apprenticeship
1872 George became proprietor of the business.
1882 the firm was reconstituted as a limited liability company.
Built two factories at Crayford and New Eltham to cope with the firm's growing requirements
By 1937 the business was incorporated with Messrs. W. F. Stanley and Co Ltd.
1937 Scientific instrument manufacturers. "Hezzanith" Instruments.