Hopkin & Williams
Manufacturers of fine laboratory and photographic chemicals. John Williams (1824–89) and William King Hopkin (b. c. 1828 d. 1906) established the business in 1850 at 10 New Cavendish Street, London. They also had a factory in the old chapel in Cross Street, Hatton Garden, London. Specialised in producing out-of-the-way chemicals.
Source
Chemist and Druggist, 9 March 1889, pp. 338–9, 13 January 1906, p. 60
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