The original paper is here, https://www.jstor.org/stable/1420890 and it's one of the masterpieces of science. The blog's author makes it seem quite ridiculous, but these experiments were done for a very important reason — it was hypothesized that the body's internal clock was chemical, but it wasn't known for sure that was the case.

If we told time via a chemical process, then clearly that reaction rate must be temperature dependent. How do you figure that out? How do you tease out what is an error due to a small sample size v. a noticeable effect? Thus the experiments began.