Nose flute in a 1959 University Yearbook

It is not rare to read in yearbooks students' depictions like "Steve is a nose flute artist and raised many laughs at his fraternity party"... But it is much scarcer to have a portrait à la nose flute published in those pages, and particularly in 1959!

Here is a page of the 1959 Columbia University - College of Pharmacy yearbook. The young pharmacist Lawrence E., member of ΡΠΦ fraternity, is shown playing a Humanatone (certainly a Gretsch one).
To plainly understand the caption, you have to know [all the readers here are not Americans] that Juilliard School is a famous New York City performing arts conservatory.