Vehicle horn horn. Bicycles often have a classic "bulb horn", operated by squeezing a rubber bulb attached to a metal horn. Squeezing the bulb forces air through a steel reed located in the throat of the horn, making it vibrate, producing a single note. The flaring horn matches the acoustic impedance of the reed to the open air, radiating the sound waves efficiently, making the sound louder. Other types of horns used on bicycles include battery-operated horns (sometimes even car horns on 12-volt circuits are incorporated) and small air horns powered by a small can of compressed gas. Oliver Lucas of Birmingham,
A Greek–English Lexicon to this riddle: which was by Scott and which was by Liddell?</poem> Two condensed editions of LSJ were published by Oxford University Press and remain in print. In 1843, the same year as the full lexicon's publication, "A Lexicon: Abridged from Liddell and Scott's Greek–English Lexicon", sometimes called "the Little Liddell" was published. Several revised editions followed. For example, a reprint, re-typeset in 2007, of the 1909 edition is available from Simon Wallenberg Press (). In 1889, an intermediate edition of the lexicon, "An Intermediate Greek–English Lexicon", was prepared on the basis of the seventh edition (1882) of LSJ. In