Still want one measurement of the earth that is inconsistent with a spherical one.
Bedford Level Canal.
I'm confused. That experiment confirms the curvature of the earth.
Per the Wikipedias
The most famous of the observations, and the one that was taught in schools until photographs of the Earth from space became available, involved a set of three poles fixed at equal height above water level along this length. As the surface of the water was assumed to be level, the discovery that the middle pole, when viewed carefully through a theodolite, was almost three feet (0.91 m) higher than the poles at each end was finally accepted as a new proof that the surface of the earth was indeed curved.
Rejoinder/rebuttal?
It was shown not to by Rowbotham, Lady Blount (who published pictures attesting this fact), and Hampden along with Daniel Shenton the current president and a few other youtubers recently IIRC. Hampden was against Wallace, the inventor of evolution. Wallace cheated needing the money and colluded with a local editor who played judge. Hampden successfully sued after a lifelong battle.
From what I understand, Daniel also had a plaque installed there.
Some hollow earthers in the earth 20th century also replicated a similar experiment on a large lake. I'd have to check my references on this one though for the details.
Rowbotham did not detect any curvature, this is true. This is because his instruments were rudimentary and insufficiently sensitive. Subsequent experiments with more advanced equipment in the same location showed the opposite. I do not understand why you hold to experiments done 100 years ago with antiquated equipment and disregard recent ones with more sensitive equipment? As part of my grad school work, I used to measure the distance between two portions of a gene within a single cell. I can't do that with a tape measure. A tape measure measures long-ish distances, inches and feet. It's not sensitive enough. I need a finely calibrated confocal microscope. That lets me measure distances on a micron scale.
A 100 year old telescope is a relatively unrefined instrument, while modern surveying equipment is extremely precise. Why don't you trust new, better technology?
Everybody knows old telescopes don't work. 
I'm sure if Alfred Russel Wallace felt the evidence would be clear we can trust his scientific expertise. Inches and feet are not sensitive enough? Exactly how big do you think your wonderous globe world is?
Inches and feet are perfectly sensitive enough. Its just that a standard telescope is not designed, calibrated or capable of measuring measure distances like that. This is doubly true of telescopes 100 years old. Lenses ground 100 years ago are demonstrably poorer, as were their alignments, leading to inferior resolution and magnification. It's not that they DON'T work AT ALL at their intended purpose, its that their intended purpose was NOT to make the types of measurements you're attempting to make. Detecting minute details requires precision instruments.
A regular telescope is not precise, especially not one built a century ago. Try out an old telescope alongside a modern one and you will see this. A typical telescope uses a series of lenses to magnify an image, and barring very specialized telescopes, such as a theodolite, cannot be aimed or adjusted on a scale of seconds of an arc, as is required to detect the earth's curvature. Thus, they are insufficiently sensitive to make the measurements accurately.
It's like trying to see the fine structure of a cell with a magnifying glass. It's not that the TYPE of instrument is wrong, its just the instrument you're trying to use isn't up to the task. You need a better, more powerful, more precise one to do the job right. Or trying to dig through the earth with a shovel. It's not that the earth becomes impenetrable after a distance, you just need a more serious tool to go further. After all,
failure to detect does NOT mean failure to exist. You just might not be looking hard enough.
I still want to know why you discount or ignore measurements of the same location made using far superior equipment.