The etymology of the word is disputed. The word first appears as reference to an 18th-century tool in glassmaking that was developed as a spring pontil. As stated in the glass dictionary published by the Corning Museum of Glass, a gadget is a "metal rod with a spring clip that grips the foot of a vessel and so avoids the use of a pontil. Gadgets were first used in the late 18th century." According to the Oxford English Dictionary, there is anecdotal (not necessarily true) evidence for the use of "gadget" as a placeholder name for a technical item whose precise name one can't remember since the 1850s; with Robert Brown's 1886 book "Spunyarn and Spindrift, A sailor boy’s log of a voyage out and home in a China tea-clipper" containing the earliest known usage in print.