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(author of The World Atlas of Coffee ) praised the book as "the most rigorous examination of filter brewing available." However, he noted that the EPUB edition is essential because "you will want to search for terms like 'fines migration' repeatedly."
Unlike espresso, which relies on pressure-driven flow, or immersion brewing, which relies on static diffusion, filter coffee is defined by gravity-driven percolation. Understanding the physics of this system requires an analysis of the coffee bed as a porous medium and the water as a solvent governed by temperature-dependent viscosity and surface tension. the physics of filter coffee epub work
: Author Jonathan Gagné has previously stated on social media that there will be no official electronic version of the book. Unofficial Files (author of The World Atlas of Coffee )