Columbia University [Students looking at a compression machine.]

Columbia University [Students looking at a compression testing machine.]

Columbia University [Students looking at a compression machine.]

Columbia University [Students looking at a compression machine.]

Columbia University [Students looking at a compression machine.]

Columbia University [Student at a typewriter.]

Columbia University [Students talking.]

Columbia University [Students talking.]

Columbia University [Students talking.]

Columbia University [Students in a bar.]

Columbia University [Professor with a student.]

Columbia University [Students in a bar.]

Columbia University [Students in a bar.]

Columbia University [Group of students.]

Columbia University [Group of students.]

Columbia University [Group of students.]

Columbia University [Group of students.]

Columbia University [Professor talking to a student.]

Columbia University [Students in a study lounge.]

Columbia University [Students talking in a stairway.]