Creosote removed; the "heavy oil", which sinks; and the "anthracene oil", which when cold is mostly solid and greasy, of a buttery consistence. Creosote refers to the portion of coal tar which distills as "heavy oil", typically between 230–270 °C, also called "dead oil"; it sinks into water but still is fairly liquid. Carbolic acid is produced in the second fraction of distillation and is often distilled into what is referred to as "carbolic oil". Commercial creosote will contain substances from six groups. The two groups occur in the greatest amounts and are the products of the distillation process—the "tar acids",
Name-letter effect name-letter effect: when the self was put under threat the effect became stronger, and it disappeared for people with negative self-evaluations. A study by Polman, Pollmann, and Poehlman found that sharing initials with members in a group can increase the quality of group work. In a study of undergraduate students they found that groups sharing initials performed better than groups that did not. Groups that had a higher proportion of shared initials exceeded groups with a lower proportion of shared initials. Researchers have looked for evidence of the driving force behind the name-letter effect outside the lab. A body of