Complex sentence: After studying abroad, he was instructor in comparative anatomy at Harvard College, 1872--1873, he also lectured at Bowdoin College, and succeeded Oliver Wendell Holmes, Sr. as Parkman professor of anatomy at Harvard Medical School in 1883.
Split into simpler sentences: After studying abroad, he was instructor in comparative anatomy at Harvard College, 1872--1873, he also lectured at Bowdoin College. He succeeded Oliver Wendell Holmes, Sr. as Parkman professor of anatomy at Harvard Medical School in 1883.