Olive oil regulation and adulteration phenolphthalein as a pH indicator dye. The base stock solution was titrated to neutralize an equal quantity of the acid, so without the presence of vegetable oil it would require 40 milliliters of acid to cause a color change, but in the pure oils tested (almond, benne, cottonseed, cod liver oil, linseed oil, and olive oil, only 6 milliliters were required. In accordance with this, olive oil adulterated with 10% mineral oil required 8 milliliters, and with 20% 11 milliliters. The adulterated oil tested in 1887 required 14 to 17 milliliters to neutralize, so it might have been 30-40% mineral
H. G. Hotchkiss Essential Oil Company Plant in 1987. H. G. Hotchkiss Essential Oil Company Plant H. G. Hotchkiss Essential Oil Company Plant is a historic factory located at Lyons in Wayne County, New York. The remaining two story commercial building is an example of a small frame structure featuring a double storefront with modest ornamentation. It was built about 1884 on the foundations of an earlier structure and is located on the bank of the original Erie Canal. It was occupied by a major producer of essential oils, principally peppermint oil used in the manufacture of patent medicine. It was listed on the National Register of