One in a series of four educational chemistry films made by Harvard professor Louis Fieser, demonstrating basic chemistry concepts and laboratory procedures. Fieser was an organic chemist known for his work with quinones and his enthusiasm in the classroom. Part 2 of the Techniques in Organic Chemistry films covers crystallization in general, extracting cholesterol from gall stones, collecting precipitate, and the laboratory procedures necessary for running related experiments and tests. Currently, Science History Institute only holds Parts 2 and 4 of this series.