Keywords
1920s, 1930s, adult, adults, b&w, b/w, board, classic, clip, coat, controls, copy space, data, discovery, education, experiment, experimental, experimenting, experiments, figure, figures, future, half-length, hand, hands, hars, he, holds, indoors, information, inside, job, jobs, knowledge, l1224, lab, lab coat, laboratory, male, man, manual, medical, men, microscope, microscopes, middle-aged, middle-aged man, nostalgia, nostalgic, observe, observer, observers, observing, occupation, occupations, old fashion, old fashioned, old time, people, person, persons, portrait, progress, progressing, research, researching, retro, science, scientific, scientist, still life, success, vintage, wearing, white, work, worker, workers, workforce, working, workman, workmen, write, writer, writing, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, l1224