Wilbur Scoville was first published in 1895 and has gone through at least 8 editions. The book was used as a pharmacological reference up until the 1960s. Scoville also wrote "Extracts and Perfumes", which contained hundreds of formulations. For a time he was a professor at the Massachusetts College of Pharmacy and Health Sciences. In 1912, he devised the test and scale known as the "Scoville Organoleptic Test" while working at the Parke-Davis pharmaceutical company. It measured piquancy, or "spiciness", of various chili peppers. It is now standardized as the Scoville scale. In 1922, Scoville won the Ebert prize from the American
Vernier scale between two points. Such an arrangement can go to higher resolution by using higher scale ratios, known as the vernier constant. A vernier may be used on circular or straight scales where a simple linear mechanism is adequate. Examples are calipers and micrometers to measure to fine tolerances, on sextants for navigation, on theodolites in surveying, and generally on scientific instruments. The Vernier principle of interpolation is also used for electronic displacement sensors such as absolute encoders to measure linear or rotational movement, as part of an electronic measuring system. Calipers without a vernier scale originated in ancient China as