.
Without even turning to the first page, the title alone is a joke.
Experimental inquiry, is it? So we should be able to expect lots of DATA to test a HYPOTHESIS, correct?
Or, when the demigod Robotham says "experimental inquiry" is he perhaps not speaking about anything experimental?
Nor would it be an inquiry?

Perhaps this is the model that flat-earthers today are using for their screwy contortions of non-logic?
Perhaps there are numerous obvious incorrect things to be found in the book?
Perhaps too many flat-earthers haven't actually read the book but rely solely on select quotes provided by their mentors?
.
This ought to be interesting, for example, how many flat-earth posts in this thread will seek to change the topic?

How many times will Ladislaus for example chime in with his "compelling" video that has nothing to do with this conversation?

BTW try to remember, when Ladislaus says somethingi is "compelling," he means to say that, he doesn't understand it.

Nor does he want to understand it. Ignorance is bliss should be his middle name.
.
So -- this purports to PROVE that the earth is a PLANE!!

Let me guess where that happens --------------------- Never.    


.
Could it be that Samuel himself gleaned these principles from the Bible via his own personal interpretation since he was a Protestant? Hmmmmmmmmmm..............

.
He could have done some research before choosing to call himself "Parallax."
Perhaps he was actually crosseyed. So parallax would have come naturally for him, then.
.
Or, he may have meant to use Paradox, and didn't learn how to spell very well.
.
Still no answer -- no surprise... selectively quoted ... but never providing any copy of the whole thing. Why do you suppose that might be?

Pagan canard.  The "science" of pagans has nothing on Scripture and the Fathers of the Church.  Parallax is a non-issue unless one first buys false science.  Only then the one who buries himself in pagan science will find every reason to debunk creation without consideration for God's truth.  

.
If "Parallax is a non-issue" then why did your demigod choose Parallax for his pen name? -- Was he just retarded?'
.
This book by your poster-boy-dimwit is quite useful. We'll get tons of mileage out of it. 
The thing is chock full of doublespeak and conundrums, self-contradictory and erroneous blatherings.
It's objectively deplorable. 

Although, I will admit the sentence structure is edifying. But that was the norm at the time, you know.
If nothing else, proper grammar, spelling and meet attention to vocabulary makes it easier for someone like me to read it.
Even so, there isn't a single page so far that doesn't have something blatantly wrong with it!
Especially in light of developments that have been made since its publishing date!
This is going to be easier than shooting fish in a barrel.
.
Now it turns out that Samuel Robotham was principally attempting to drum up an industry in which he could sell his wonder drugs and snake-oil products, so this book was one step in getting people to think they've been lied to, and he has their answers for them!
He didn't believe in flat-earhism himself!
He just saw it as a means by which he could con the public and make a fast buck! Amazing...
.
Step right up, Ladies and Gentlemen! See for yourself the marvelous instant effects of the Robotham Cure-All Elexir!!!
.
Here is an example of a college graduate, no less (of course he could be a liar and a fake), who read and admired Robotham.
He's obviously a liar when he says he's "a pilot" so maybe he's never been to college, either. 
He sure doesn't show it in his writing.
.
He's answering a challenge over whether the flat-earth movement somehow started on the Internet.
.
.

Do some research. The entire world believed is [it] and a large percentage still does. I am not of either clan. I know that the earth doesn’t curve at 8” per mile squared bcuz I’m a pilot and I don’t keep pushing the nose down every 2 minutes so I don’t end up in space. Also was in the navy which uses line of sight weaponry and thermal. At well more than a hundred miles out. If you can do the math that puts he [the] target hundreds and hundreds of feet under the water. So people using real life applications in real life jobs noted this for years. Decades even. It’s a solid thing among pilots. Ask a pilot if they keep pushing th nose down every two minutes to keep from ending up in space and they will look at you like your insane and laugh. Do the math. They ( nasa) says that the earth curves away from you at 8” per mile squared. So go to the top of the tallest building in your city and or get a drone. Take it up as high as you can. Look at the buildings to the left and right and note that they do NOT appear to be tilting away from you on both sides. You would be able to see that DRASTICALLY at 8” per mile squared. I’m not a flat earther but I’ve been in too many REAL life situations that the numbers do NOT add up to what nasa says and that may be what makes people with real jobs and experience take a side. I don’t think there are only two sides to anything. Black. White. Up and down. There is always space in between. Same as this. My questions are more along the lines of why are they lying about the size ? It may be round but it’s huge. 8” per mile squared would allow you to see the earth curve on any beach with a decent opening to the ocean. U would see it drop on both sides. By A LOT. You have never seen the curve with your own eyes. This is a fact. You have been SHOWN a curve. Try to see it. Do it yourself. Go to the top of a building. Each city I have been to has one tall enough to see for a good distance. And look at the buildings. Take pics if u don’t have a fish eye lens. And then post them. I have one of the best cameras at the moment for zoom. The Nikon coolpix p900. I can see planets with it. Although they look like flashing star bursts. I can also see from my home to a city that’s 50 plus miles away. ( the manual tells you zoom is from 2.6 feet to INFINITY) just so you know. It’s power beyond comprehension. Trust me. Try it. There aren’t only two options. The other is that someone fkd up or is lying for some reason. Means nothing that it’s flat or round unless we get into unraveling physics which I can see being a lot of work and why they also wouldn’t ever want to do it. This is far from over. In fact it’s just gettin warm. Trust me!

.
This 8 inches per mile squared he keeps saying (even says it's from nasa) is directly out of Robotham's book, and is not promoted or recognized by NASA or any other corporate entity. It's just a favorite (and inaccurate) canard of the flat-earthers. 
.

.
Flat-earther's version of a lunar eclipse!
.

.
There are a growing number of online videos, websites, blogs and discussion forums (YouTube channel pages offer a comment section that's like a discussion forum) where informed and observant viewers have posted meet opposition to the many falsehoods and mundane canards flat-earthers have embraced, which ought to give due pause to such flat-earth nonsense. However, their reactions speak volumes when flat-earthers come in whining and moaning and hurling puerile epithets, usually with bad grammar, spelling and punctuation. All too often when their obvious language errors are pointed out, their reaction is to provide yet more of same, pridefully, sometimes even admitting that they couldn't care less about such typing errors, as though they've achieved their goal by irritating other readers.
.
They prove by their own behavior that they enjoy replicating error. They demonstrate they have an appetite and penchant for thinking erroneously, collecting falsehoods, memorizing lies and retelling them, just to get the shock value from the reactions of others. One silly girl has made a Facebook story out of her making stencils and spray painting flat-earth slogans on public walls, utility poles, bulletin boards and such -- anywhere she can. She even has posted pictures of herself standing there with stencil and paint can in hand, smiling with pride. Her reason? She says, "We've been lied to," and therefore "the earth is flat."
.
In other words, since "we've been lied to," here is another lie for you, since you're okay with being lied to.
.
How anyone could attribute credibility to the likes of Samuel Rowbotham's writings is quite alarming. He was totally discredited over a century ago and so the case ought to be settled. But true to form, flat-earthers dredge up his inane and incorrect conclusions, as if they are credible just because flat-earthers (who refuse to test anything) say they're worth it.
.
But for flat-earthers, who are quite at home with lies, Rowbotham's drivel has become their staple.

.
Henry Yule Oldham, (14 December 1862 – 14 March 1951) was a teacher and geographer who, in 1901, conducted the definitive version of the Bedford Level experiment, one of the many proofs that the Earth is spheroidal.
.
The Bedford Level experiment
In 1838 Samuel Rowbotham of the Flat Earth Society had claimed to demonstrate that a six-mile length of the Old Bedford River (Rowbotham refers to it erroneously as a "canal"), Cambridgeshire, had a flat surface and not a curved one (as would be expected if the earth were spheroid). In 1870 on the same spot the noted explorer Alfred Russel Wallace, a trained surveyor, soundly disproved the incorrect Rowbotham observation, but the mystery was not allowed to rest and Rowbotham's supporters continued to argue their case with great vigour in the courts, in scientific journals and in pamphlets. In 1901 Oldham used a plate camera and theodolite for his careful observations along the length of the river and he presented his results at an illustrated lecture held at the British Association for the Advancement of Science.^[6][7] His experiment, because of its photographic proof, is regarded as definitive and was taught in schools.^[8]
.
.
Consequently, how do current flat-earthdom syndromers contend with the glaring contradiction of their pet fantasy, against objective reality as known by such definitive proof of the earth's sphericity? Why, of course, they do the most expedient thing! They deny that experimentation exists! "There is no such thing as scientific experimentation!" they say, as if such inanity has any weight whatsoever.