It's all right there in the literature. Read it.
I have read it and couldn't find where it described the telescope that he was using.
Here is the quote from Experiment #1...
The author, with a good telescope, went into the water
Not description of the telescope. What does good mean?
Here's an experiment I did myself: I read the literature and found the methods inconsistent to the methods used in this thread.
Is there a link there that we are supposed to be able to go to? Otherwise, that line doesn't make any sense.
Nope. The 1800's were the golden age of telescopes, when glass and lens manufacturing was perfected.
So in the 1800s they were making micro accurate lenses that were affordable for the common person, and portable? Can you please provide some evidence of that?