Felix Gustav Gustafson, nationally known plant physiologist, attained his seventieth year on last January 8, and is entering upon his retirement. Immediately after his graduation from the University of Wisconsin in 1915, he committed himself to his future career, taking employment at the Marine Biological Laboratory at Woods Hole, Massachusetts.

For over forty years as Botanist at Woods Hole, as Assistant at Harvard University, and at all ranks from instructor to professor at The University of Michigan-he has carried on research into processes of plant respiration and growth.

A colleague has called his work furthering the commercial production of seedless fruit "the most practical discovery made by a botanist at this institution." His investigations into vitamin formation and storage in plants gained substantial financial backing from the United States Institute of Public Health.

Throughout his last decade at Michigan, he served on the editorial boards of the American Journal of Botany and Plant Physiology, to which he was also a frequent contributor. To his teaching at all levels and to such additional interests as the training of high school teachers of science, he brought the same energy, which characterized his research.

For long service, ably and tirelessly rendered, the Regents of the University owe him a profound debt of gratitude, a small part of which they are happy to discharge in conferring on him the title of Professor Emeritus of Botany and inviting him to partake of the courtesies extended to that title.