Q:

What bits were cut out of Jules Verne's "The Mysterious Island" for the Kingston translation?

I'm looking for the actual removed text. Unfortunately, I just finished reading the abridged version without realising it was abridged until reading the note on the final page.
I would like to read whatever it is I've missed out on. I found one scene here, but that's all I've been able to find.
The full text can be found here - I just don't want to have to comb through 600 pages of text to find the differences.
The Kingston text can be found here.
I've also uploaded text versions of both here. I tried diffing them myself but because they are differently formatted every line is different. I will try later removing line breaks from both and seeing what happens. Until then anyone who's interested can have a go themselves. I will post my results if I get that far sometime.

A:

Sidney Kravitz, who translated the version you link to, has a partial list in a note to someone interested in fixing the Kingston translation:

Second, Kingston's most serious error by far is his alteration of Nemo's recital in Chapter XVI of Part III. I am tempted to call this the most serious error in any English translation of Verne's novels. 
Third, you might care to change Captain Harding to Cyrus Smith throughout (also change Pencroft to Pencroff). 
Fourth, the second paragraph in Chapter X, Part II, is omitted. It deals with details in the design of a small sailing vessel. I once thought that Kingston omitted this paragraph because he was unfamiliar with its nautical language. On the contrary, the Encyclopedia Britannica (1944 edition) states that Kingston (1814-1880) "...had a practical knowledge of seamanship, and his stories of the sea, full of thrilling adventures and hairbreadth escapes, exactly hit the taste of his boy readers." If you can fill in this paragraph in your version you will find that most readers will quickly skim over it. 
Fifth, on the outward trip to Tabor Island (Chapter XIII, Part II) Captain Pencroff was perfectly satisfied with his crew (but it won't corrupt your readers if they know that he spoke of rewarding them with nothing less than a quarter liter of wine). 
Sixth, Kingston omits simple-to-translate words, phrases and paragraphs on almost every page and I can think of no reason why he did this. If you attempt to fill in these omissions then you will end up doing what I ended up doing namely to do your own translation from scratch. 

