Columbia University [Law students holding a mock trial.]

Columbia University [Students drawing a nude model in an art class.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]

Columbia University [Man reading in a library.]

Columbia University [Students playing cards.]

Columbia University [Man studying in a library.]

Columbia University [Man reading in a library.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Mass examination.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]

Columbia University [Medical students attending a lecture.]