Theodor von Oppolzer's Canon of Eclipses

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The discussion centers on Theodor von Oppolzer, a notable astronomer and mathematician, and his work, the Canon of Eclipses. A free online version of this book has been found, prompting interest in its content and calculations. Participants express a desire to learn more about Oppolzer's methodologies and how they compare to modern eclipse calculations. Additional resources, including links to his book and a website featuring images of his maps, are shared. There is curiosity regarding the copyright status of the book, as it appears not to be available for download despite its age. The conversation encourages further exploration and understanding of Oppolzer's contributions to astronomy.
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Summary:: A call for information about Oppolzer and his Canon of Eclipses

Theodor von Oppolzer was an incredible astronomer and mathematician. I recently came across a free online version of his Canon of Eclipses and (for the parts I understand) I have enjoyed going through it and learning more. I'm wondering if anyone on this forum has reviewed Oppolzer's works. I searched the forum before making this post and I didn't see any other posts about Oppolzer.

The link to his book is right here: https://archive.org/details/canonofeclipsesc0000oppo/page/n1

There's a website that mentions him and gives some images of his maps: http://eclipse-maps.com/Eclipse-Maps/History/Pages/1887_Canon_der_Finsternisse_-1207_to_-375.html

He has a crater on the moon named after him: https://en.wikipedia.org/wiki/Oppolzer_(crater)

I'm still learning how to read and understand the math behind calculating the eclipses, any help or extra comment on Oppolzer and his work will be appreciated. I just want to better understand how he conducted his calculations and where they deviate from what's believed today.
 
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It would seem that the copyright should have expired for this book, but it is not available for download?
 

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