the catalogue titled '1898 Catalogue of Microscope Object Glasses and Apparatus, Made & Sold by Powell & Lealand No 170 Euston Road, N. W. , London', catalogue with fold out plate, full page plates and several in-text illustrations, with two separate price lists for 1896 and 1899, with a handwritten receipt from Powell & Lealand to a Dr Ronalds (see footnote for probable match) for various objectives dated 1882. Footnote: Dr Edmund Ronalds (1819-1889) was an academic and industrial chemist, he obtained his doctorate in Germany, Dr Ronalds became a lecturer at the Middlesex Hospital in London, then the inaugural professor of chemistry at Queens College (now the National University of Ireland) in Galway, Ronalds resigned to run the important Bonnington Chemical Works in Edinburgh. During his medical research, he published new findings on the constituents of human bile and urine that were of value in clinical tests, later a pioneer in incorporating advanced research into a manufacturing firm, including being the first to isolate ethane, butane and propane dissolved in crude oil. Arguably his most important publication was a series of books with Thomas Richardson in the period 1848-1855 entitled Chemical Technology, recognised as standard texts, these effectively brought the word "technology" into the English language and introduced university teaching of chemistry applications for industry, which evolved into the discipline of chemical engineering early in the 20th century.