Harlow Shapley
During his graduate studies at Harvard University he started a systematic study of meteor spectra at the suggestion of Harlow Shapley in 1929. He continued the work on meteors throughout his active scientific life. He organized one of his most successful observational campaigns in 1946, when on the night of October 9/10 a spectacular shower of the Giacobinids (October Draconids) provided many important photographic spectra.