Historically (since 2500 years ago), philosophy - "love of wisdom" in Greek - encompassed all intellectual endeavors, and natural philosophy was seen as its part. However, these days the term science has supplanted "natural philosophy" and scientists are not considered to be philosophers.
I seem to recall that there was a watershed event in the second half of 19th century (circa 1870?) when a major (German?) scientist (Helmholtz?) declaimed (at a major scientific convention?) something like
Philosophers think that scientists are conceited and scientists think that philosophers are insane.
Alas, I have not been able to find a specific reference.
So, who/when/where said that?
PS1. The meaning of the phrase is that philosophers, employing their traditional scholarship, managed to learn zilch about how nature actually works, while scientists, employing the scientific method, managed to learn quite a lot.
PS2. Asked on History of Science and Math as recommended in the comments.
PS3. According to Philipp Frank in "The Origin of the Separation Between Science and Philosophy":
Kant stated bluntly that the observable facts of the physical world are completely and satisfactorily described and systematized by "science proper"; "philosophy proper" can never tell us anything about them.
He never mentions anything related to my question - i.e., a blunt disparagement of philosophers by a scientist.