Gelatin is a protein and in aqueous solutions is a hydrophilic colloid. Gelatin derived from an acid-treated precursor is known as Type A, and gelatin derived from an alkali-treated precursor is known as Type B.
The philosophes (French for philosophers) were the intellectuals of the 18th century Enlightenment. [1] Few were primarily philosophers; rather, philosophes were public intellectuals who applied reason to the study of many areas of learning, including philosophy, history, science, politics, economics and social issues.
Between 1740 and 1789, the Enlightenment acquired its name and, despite heated conflicts between the philosophes and state and religious authorities, gained support in the highest reaches of government. Although philosophe is a French word, the Enlightenment was distinctly cosmopolitan; philosophes could be found from Philadelphia to St. Petersburg. The philosophes considered themselves part of a grand republic of letters that transcended national political boundaries.