[Avodah] can you identify this book?

[Maxi Yedid]

Hello
In the first volume of Shut Rabbi Akiva Eiger, in the introduction, the sons
of R. Akiva Eiger, R' Shlomo and R' Abraham mention a "science" book. Does
anyone happen to know wich book is it?

Thanks

By the way, I'm new in this list so nice to meet everyone.
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