In 1916 Pyrex found another market in the laboratory. After removing lead from Nonex to make the glass safe for cooking, they named the new formula “Pyrex”-“Py” for the pie plate, the first Pyrex product. At the suggestion of Bessie Littleton, a Corning scientist’s wife, the company began investigating Nonex for bakeware. Pyrex has its origins in the early 1910s, when American glass company Corning Glass Works began looking for new products to feature its borosilicate glass, Nonex. Instead, earlier texts suggest carrying out test reactions in wine glasses. Either way, the test tube likely has its origins in the early 19th century, as the form does not seem to appear in 18th century chemistry sets. Faraday mentions that small glass tubes would make a useful vessel for test reactions in his 1827 book, Chemical Manipulation. Berzelius describes the more robust cousin of the test tube, the boiling tube, in an 1814 article.
Two renowned chemists, Jons Jacob Berzelius (1779–1848) and Michael Faraday (1791–1867), have been suggested as the inventor of the test tube. Test tubes are the perfect shape and size to hold small amounts of substances, usually liquid, which are then manipulated in some way, such as being placed over the flame of a Bunsen burner. The test tube is one of the most commonly used pieces of laboratory ware. This object is a test tube made of Pyrex glass.
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