Browning & Co. (1860-1925), established by John Browning, born London, an optical and philosophical instrument maker at the Minories and the Strand, London. Maker of telescopes and spectrocopic instruments. Browning retired in 1905, moving to Glouceshire, with his business continuing until his death in 1925 (Webster; Grace’s Guide).
Dollond & Co. (c.1750-1925), a family of optical instrument makers, London, established by John and Peter Dollond, being succeeded by George (Huggins) Dollond and then William. Apart from the partnership of Peter and John, they traded throughout the period as Dollond. Best known for telescopes they produced a range of optical instruments. Taken over by Aitchison in 1925, they became known as spectacle makers and retailers – now part of Boots the chemists (ODNB; Barty-King 1986; King 1955, 145-54).
(Adam) Hilger (1874-1948), established by Adam Hilger with his brother Otto after leaving the employment of Browning and Co. Makers of philosophical and optical instruments they specialised in the manufacture of spectroscopic equipment. After the death of Otto, the firm became a Limited company and was later taken over by E.R.Watts and Sons, surveying instrument makers, to become Hilger & Watts Ltd (Grace’s Guide).
Slater, Thomas (1818-1899), born Northampton, an optical instrument maker based at various addresses in London. A little known optician who was commisioned to grind the 24-inch lens for the Craig Telescope erected on Wandsworth Common in 1852. This proved defective and could be only ised successfully if it was stopped-down (King 1955, 254-5; Webster Database).
Troughton & Simms (1826-1922), mathematical and optical instrument manufacturer formed from a partnership between Edward Troughton and William Simms. After 1860 with the death of William Simms it was managed by William Simms Junior and cousin James – limited compamy by 1915 and merged with T Cooke & Sons in 1922. Known for it optical instruments (telescopes & meridian) with divided scales, optics sourced from Merz and later from Cooke (Webster; Graces’s Guide; McConnell 1992).