ResearchBuzz: Firehose<p>Found the Word Search Drum Machine. From the help tab: “This is a drum machine where you can search classic literary works for specific words at a defined rate, triggering drums each time your favored terms are found.”</p><p><a href="https://rbfirehose.com/2025/07/18/word-search-drum-machine/" class="" rel="nofollow noopener" target="_blank">https://rbfirehose.com/2025/07/18/word-search-drum-machine/</a></p>
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#ProjectGutenberg
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Bibliolater 📚 📜 🖋<p>📖 **The First Six Books of the Elements of Euclid by Euclid and John Casey**</p><p>"_Read or download for free_"</p><p>🔗 <a href="https://www.gutenberg.org/ebooks/21076" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="">gutenberg.org/ebooks/21076</span><span class="invisible"></span></a>. </p><p><a href="https://qoto.org/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a> <a href="https://qoto.org/tags/Euclid" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Euclid</span></a> <a href="https://qoto.org/tags/Maths" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Maths</span></a> <a href="https://qoto.org/tags/Mathematics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mathematics</span></a> <a href="https://qoto.org/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://qoto.org/tags/Read" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Read</span></a> <a href="https://qoto.org/tags/Download" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Download</span></a> <a href="https://qoto.org/tags/Book" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Book</span></a> <a href="https://qoto.org/tags/Ebook" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Ebook</span></a> <a href="https://qoto.org/tags/Bookstodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Bookstodon</span></a> <span class="h-card"><a href="https://a.gup.pe/u/bookstodon" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>bookstodon</span></a></span></p>
Bibliolater 📚 📜 🖋<p>📖 **Roget's Thesaurus by Peter Mark Roget**</p><p>"_Read or download for free_"</p><p>🔗 <a href="https://www.gutenberg.org/ebooks/22" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="">gutenberg.org/ebooks/22</span><span class="invisible"></span></a>. </p><p><a href="https://qoto.org/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a> <a href="https://qoto.org/tags/Thesaurus" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Thesaurus</span></a> <a href="https://qoto.org/tags/Read" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Read</span></a> <a href="https://qoto.org/tags/Download" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Download</span></a> <a href="https://qoto.org/tags/Book" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Book</span></a> <a href="https://qoto.org/tags/Ebook" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Ebook</span></a> <a href="https://qoto.org/tags/Bookstodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Bookstodon</span></a> <span class="h-card"><a href="https://a.gup.pe/u/bookstodon" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>bookstodon</span></a></span></p>
Andrew D. Hwang<p>Filed under free online math materials: Two ebooks at Project Gutenberg on thermodynamics (by Planck) and statistical mechanics (by Gibbs). Read more:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/thermodynamics/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/thermodynamics/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/Physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Physics</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>In 2012 and 2013, I digitized two books on mathematical philosophy for Project Gutenberg: one by Alfred North Whitehead, one by Bertrand Russell. Each may be of interest to teachers and university-level students. Read more:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/mathematics-and-philosophy/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/mathematics-and-philosophy/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>Two Project Gutenberg ebooks on science and mathematics, and brief thoughts on contemporary perils. Read more:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/science-and-mathematics/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/science-and-mathematics/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Joy Tilton<p>I love that place, for picking up classic literature especially. <a href="https://mstdn.social/tags/ProjectGutenberg" class="mention hashtag" rel="tag">#<span>ProjectGutenberg</span></a>.</p>
Anne Delong<p><span class="h-card" translate="no"><a href="https://mastodon.nl/@waarismijnhoofd" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>waarismijnhoofd</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.social/@publicdomainrev" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>publicdomainrev</span></a></span> </p><p>There's a version with images at Project Gutenberg</p><p><a href="https://www.gutenberg.org/ebooks/27307" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">gutenberg.org/ebooks/27307</span><span class="invisible"></span></a></p><p><a href="https://musician.social/tags/publicdomain" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>publicdomain</span></a> <a href="https://musician.social/tags/projectgutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>projectgutenberg</span></a></p>
Andrew D. Hwang<p>Two books in French on complex analysis (residues, and elliptic functions) produced at <a href="https://mathstodon.xyz/tags/DistributedProofreaders" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DistributedProofreaders</span></a> for <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a>, with thoughts about what we choose to value and preserve, and the urgent weight our choices bear:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/on-collaboration-across-space-and-time/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/on-collaboration-across-space-and-time/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a></p>
Andrew D. Hwang<p>Theory of Finite Groups by William Burnside, a 2012 digitization of the 1897 treatise produced at <a href="https://mathstodon.xyz/tags/DistributedProofreaders" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DistributedProofreaders</span></a> for <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a> in collaboration with Brenda Lewis and many other volunteers. Read more:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/theory-of-finite-groups/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/theory-of-finite-groups/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a></p>
Andrew D. Hwang<p>Two books by Augustus De Morgan digitized for Project Gutenberg, one about algebra and geometry, the other about calculus. Their style is formal by today's standards, but each may be useful for self-study by students and teachers. Read more:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/expositions-by-de-morgan/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/expositions-by-de-morgan/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/ITeachMath" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ITeachMath</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>Some (relatively) light summer reading: Lectures on Elementary Mathematics by Joseph Louis Lagrange, digitized for Project Gutenberg in 2011. Read more:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/lectures-on-elementary-mathematics/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/lectures-on-elementary-mathematics/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>Two books on relativity by Arthur Eddington bookend my time digitizing for Project Gutenberg:<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/eddington-on-relativity/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/eddington-on-relativity/</span></a></p><p><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a> <a href="https://mathstodon.xyz/tags/Physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Physics</span></a></p>
Andrew D. Hwang<p>Among my earliest solo productions for Project Gutenberg are two books on relativity by Einstein, posted in May, 2011: <a href="https://www.diffgeom.com/blogs/free-online-math-materials/einstein-on-relativity/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/einstein-on-relativity/</span></a></p><p>An installment of Free Online Math Materials<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/free-online-math-materials/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/free-online-math-materials/</span></a></p><p><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/Physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Physics</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>In the aughts of the 20th century, differential geometry was recognizably the subject students learn today. The Project Gutenberg ebook Leçons de Géométrie Supérieure by Ernest Vessiot, and a few words about the book's Content Provider:</p><p><a href="https://www.diffgeom.com/blogs/free-online-math-materials/lecons-de-geometrie-superieure/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/lecons-de-geometrie-superieure/</span></a></p><p><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/Mathematics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mathematics</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Jimmer<p>"Notes on Nursing" <a href="https://mastodon.social/tags/FlorenceNightingale" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FlorenceNightingale</span></a> <a href="https://mastodon.social/tags/Books" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Books</span></a> <a href="https://mastodon.social/tags/Free" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Free</span></a> <a href="https://mastodon.social/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a> <a href="https://mastodon.social/tags/PublicDomain" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PublicDomain</span></a> <a href="https://www.gutenberg.org/ebooks/17366" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">gutenberg.org/ebooks/17366</span><span class="invisible"></span></a></p>
Doktor Overcomma :vepi:<p>Project Gutenberg is on a Finnish binge lately<br><a href="https://www.gutenberg.org/ebooks/76350" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">gutenberg.org/ebooks/76350</span><span class="invisible"></span></a><br><a href="https://dobbs.town/tags/Finnish" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Finnish</span></a> <a href="https://dobbs.town/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>Two centuries ago (1825 and 1827), Gauss published two papers on intrinsic curvature of surfaces. In 2011, using page scans and OCR text generously provided by Brenda Lewis at Distributed Proofreaders, I digitized the English translation by Hiltebeitel and Morehead for Project Gutenberg.</p><p>This Very Short blog post introduces the geometric context (extrinsic and intrinsic curvature of surfaces) for non-mathematicians: <a href="https://www.diffgeom.com/blogs/free-online-math-materials/general-investigations-of-curved-surfaces/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/general-investigations-of-curved-surfaces/</span></a></p><p><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/MathArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MathArt</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>The 1914 British second edition of Calculus Made Easy is by far the most popular ebook I helped produce for Project Gutenberg: <a href="https://www.diffgeom.com/blogs/free-online-math-materials/calculus-made-easy/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/calculus-made-easy/</span></a></p><p>Part of my 2010 post for the Distributed Proofreaders blog about the book (full text: <a href="https://blog.pgdp.net/2010/10/13/calculus-made-easy/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">blog.pgdp.net/2010/10/13/calcu</span><span class="invisible">lus-made-easy/</span></a>)<br>---(snip)---<br>The mathematical study of rates of change and total change, also known as “the differential and integral calculus”, has frightened generations of students. Ironically, this scholastic trauma is often unnecessary: Many formal rules of calculus are nearly trivial to carry out. The mathematical difficulties lie in understanding and using the rigorous logical framework of the calculus—what mathematicians nowadays term “elementary real analysis”—and in establishing the correctness of the formal manipulations and their connections with mathematical interpretations.</p><p>Sylvanus Phillips Thompson’s “Calculus Made Easy” gives cogent yet entertaining and irreverent explanations of these easy calculational rules. Justifications are conceptual, but beneficially simplified and intuitive. Popularized and later updated by the recreational mathematics author Martin Gardner, “Calculus Made Easy” has remained a widely-read introductory text for the past century.</p><p>[...]</p><p>If you’ve had unpleasant experiences with calculus, if your knowledge has grown rusty, or if you’ve simply never encountered this powerful and intriguing branch of mathematics, Thompson’s gem of a textbook should prove a pleasant, thought-provoking, and ultimately rewarding read.<br>---(snip)---<br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/Mathematics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mathematics</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a></p>
Andrew D. Hwang<p>Over the years I've helped create a variety of free online resources for teaching and learning math, including textbook manuscripts, public domain ebooks, and interactive software. I've posted haphazardly at mathstodon about a few of these items, but am starting a line of Very Short blog posts at my online shop Differential Geometry to showcase examples more systematically.<br><a href="https://www.diffgeom.com/blogs/free-online-math-materials/free-online-math-materials/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">diffgeom.com/blogs/free-online</span><span class="invisible">-math-materials/free-online-math-materials/</span></a><br><a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Math</span></a> <a href="https://mathstodon.xyz/tags/ProjectGutenberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProjectGutenberg</span></a> <a href="https://mathstodon.xyz/tags/Mathematics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mathematics</span></a></p>
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