MR / Schenectady, New York. Schenectady High School (urban, public high school). Grade 10 chemistry lab. One of a series of photographs taken during a chemistry lab in which students explore the properties of acids and bases. Teacher hands student (Boy; 15; Puerto-Rican American) a tray of materials he will use to complete the lab. ID: AJ-g10p. MR: Phi6, Qui8. ©Ellen B. Senisi