Hartley Wood and Co Ltd were a company of glass manufacturers established in Sunderland, England.
John Hartley of Dumbarton, Scotland, moved to the Nailsea, near Bristol, England, in 1812 and began working with Robert Lucas Chance at the Nailsea Glassworks. On 1 April 1828, he transferred to the British Crown Glass Company manufactory at Oldbury (then Worcestershire), which had been bought up by Robert Lucas Chance in 1824. By 1832 British Crown Glass was experimenting with the new sheet glass manufacturing method, which required French workers to make it and this was not favoured by Hartley's two sons, James and John. After John Hartley Snr. died in 1833, the two brothers were taken into partnership by Robert Lucas Chance in 1834 and the firm became known as Chances and Hartleys in 1834.
In 1836 the Hartley brothers left Chances and Hartleys (which then became Chance Brothers and Company) due to differences of opinions regarding the viability of sheet glass. The brothers then moved north to Sunderland to set up their own business. The reasons why Sunderland was chosen as the site for their new venture are unclear, but it may have been because other family members (uncles and cousins) were already established in the glass making industry there.
The Wear Glass Works was established at the junction between Trimdon Street and Hylton Road, Deptford, Sunderland c 1836, trading as James Hartley and Co. Two years later, on 25 November 1838, James Hartley was granted a patent for Hartley's Patent Rolled Plate, manufactured by a new cast glass process, and the firm concentrated on this for the next fifty years. On 1 January 1840 John Hartley conveyed his share of the business to his brother, leaving James Hartley as a sole trader.
When James Hartley decided to retire from the business on 31 December 1869, a new partnership was forged comprising the two remaining partners from the existing partnership, together with John's younger brother, Thomas Blenkinsopp Hartley and Hartley Perks Kayll. At this point the Company style reverted to James Hartley and Co. When Thomas Blenkinsopp Hartley died in 1872 the other 3 partners continued the business. On 22 April 1878 John Hartley too retired from active participation in the business, leaving the Kaylls as co-partners. James Hartley died in London on 24 May 1886 and his share of the business was divided between his two surviving sons, James and John. A month after his father's death, James sold his interest in the glassworks to his brother.