H. Keffer Hartline in his laboratory, 1965
Photo by Don C. Young
Throughout his career Hartline's research depended on advances in instrumentation and techniques, including the oscilloscope, microdissection, and micropipette electrodes. He was known as a skilled inventor, and worked closely with instrument-makers and electronics engineers. In 1962 Hartline introduced computing to neurophysiologic research when he purchased the Rockefeller Institute's first computer, a Control Data Corporation 160-A, for data analysis.