<div dir="ltr"><div class="gmail_default"><font size="2">Excellent! Congratulations, Doron.<br></font></div><div class="gmail_default"><font size="2">Best wishes,</font></div><div class="gmail_default" style="font-size:large"><font size="2">Christine</font><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 2 Dec 2023 at 17:27, Doron Swade via Members <<a href="mailto:members@lists.sigcis.org">members@lists.sigcis.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg8621709447326101884"><div style="overflow-wrap: break-word;" lang="EN-GB"><div class="m_8621709447326101884WordSection1"><p class="MsoNormal"><span style="font-size:12pt">HI Brian<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt">Many thanks for your kind words and your warming encouragement all these years.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt">Best wishes<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt">Doron<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt"><u></u> <u></u></span></p><div><div style="border-color:rgb(225,225,225) currentcolor currentcolor;border-style:solid none none;border-width:1pt medium medium;padding:3pt 0cm 0cm"><p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Brian Randell <<a href="mailto:brian.randell@newcastle.ac.uk" target="_blank">brian.randell@newcastle.ac.uk</a>> <br><b>Sent:</b> Saturday, December 2, 2023 3:31 PM<br><b>To:</b> <a href="mailto:doron.swade@blueyonder.co.uk" target="_blank">doron.swade@blueyonder.co.uk</a><br><b>Cc:</b> <a href="mailto:members@lists.sigcis.org" target="_blank">members@lists.sigcis.org</a><br><b>Subject:</b> Re: [SIGCIS-Members] Babbage Engine - Full Technical Description on Open Access<u></u><u></u></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span>Hi Doron:<u></u><u></u></span></p><p class="MsoNormal"><span><u></u> <u></u></span></p><p class="MsoNormal"><span>Many thanks – and congratulations, on a truly wonderful project, and now this splendid documentation.<u></u><u></u></span></p><p class="MsoNormal"><span><u></u> <u></u></span></p><p class="MsoNormal"><span>Cheers<u></u><u></u></span></p><p class="MsoNormal"><span><u></u> <u></u></span></p><p class="MsoNormal"><span>Brian<u></u><u></u></span></p><p class="MsoNormal"><span><u></u> <u></u></span></p><div><div><div><p class="MsoNormal"><span style="font-size:9pt;font-family:"Helvetica",sans-serif;color:black">—<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:9pt;font-family:"Helvetica",sans-serif;color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:9pt;font-family:"Helvetica",sans-serif;color:black">School of Computing, Newcastle University, 1 Science Square, Newcastle upon Tyne, NE4 5TG<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:9pt;font-family:"Helvetica",sans-serif;color:black">EMAIL = <a href="mailto:Brian.Randell@ncl.ac.uk" target="_blank">Brian.Randell@ncl.ac.uk</a>   PHONE = +44 191 208 7923<u></u><u></u></span></p></div></div></div><p class="MsoNormal"><span style="font-size:9pt;font-family:"Helvetica",sans-serif;color:black">URL =  <a href="https://www.ncl.ac.uk/computing/staff/profile/brianrandell.html" target="_blank">https://www.ncl.ac.uk/computing/staff/profile/brianrandell.html</a></span><span><u></u><u></u></span></p><p class="MsoNormal"><span><u></u> <u></u></span></p><p class="MsoNormal" style="margin-right:0cm;margin-bottom:12pt;margin-left:36pt">On 02/12/2023, 15:01, "Members" <<a href="mailto:members-bounces@lists.sigcis.org" target="_blank">members-bounces@lists.sigcis.org</a>> wrote:<u></u><u></u></p><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Dear All <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">I am pleased to report that the full technical description of Charles Babbage’s Difference Engine No. 2 has recently been made available online on open access by the Science Museum (London). <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">The Engine was built to Babbage’s original drawings (1847-1849) and completed in 2002. It has 8,000 parts, weighs 5 tonnes, and works as Babbage intended. It is the first of Babbage’s calculating engines to be built in its entirety. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Over the decades-long life of the project I documented the interpretation of the 19th-century drawings, the design decisions made in its construction, its assembly, operational debugging, and what was learned from running the Engine for countless live public demonstrations. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">A full description of the Engine is presented in two works available online: <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Difference Engine No.2 Technical Description <<a href="https://www.sciencemuseum.org.uk/sites/default/files/2023-09/DE2_Technical_Description.pdf%3e" target="_blank">https://www.sciencemuseum.org.uk/sites/default/files/2023-09/DE2_Technical_Description.pdf></a> (232 pages, 131 illustrations) <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Provides a detailed interpretation of Babbage’s design, and documents the technical understanding that informed the successful construction of the working machine. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Difference Engine No.2 User Manual <<a href="https://www.sciencemuseum.org.uk/sites/default/files/2023-08/User_Manual_PDF_Vsn_1.1_Final_SEC1.pdf%3e" target="_blank">https://www.sciencemuseum.org.uk/sites/default/files/2023-08/User_Manual_PDF_Vsn_1.1_Final_SEC1.pdf></a> (147 pages, 199 illustrations) <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Documents the practical procedures for operating the Engine safely, setting up a calculation, testing, trouble-shooting, fault-finding, and maintenance including lubrication. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">The two documents are free-standing i.e. relevant drawing-excerpts are embedded in the text so that understanding does not, for the most part, rely on reference to the full 19th-century design drawings. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Direct Browser Links: <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Technical Description: <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><a href="https://www.sciencemuseum.org.uk/sites/default/files/2023-09/DE2_Technical_Description.pdf" target="_blank">https://www.sciencemuseum.org.uk/sites/default/files/2023-09/DE2_Technical_Description.pdf</a> <<a href="https://www.sciencemuseum.org.uk/sites/default/files/2023-09/DE2_Technical_Description.pdf%3e" target="_blank">https://www.sciencemuseum.org.uk/sites/default/files/2023-09/DE2_Technical_Description.pdf></a> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">User Manual: <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><a href="https://www.sciencemuseum.org.uk/sites/default/files/2023-08/User_Manual_PDF_Vsn_1.1_Final_SEC1.pdf" target="_blank">https://www.sciencemuseum.org.uk/sites/default/files/2023-08/User_Manual_PDF_Vsn_1.1_Final_SEC1.pdf</a> <<a href="https://www.sciencemuseum.org.uk/sites/default/files/2023-08/User_Manual_PDF_Vsn_1.1_Final_SEC1.pdf%3e" target="_blank">https://www.sciencemuseum.org.uk/sites/default/files/2023-08/User_Manual_PDF_Vsn_1.1_Final_SEC1.pdf></a> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Additional Material <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">The Babbage Papers at the Science Museum: <<a href="https://collection.sciencemuseumgroup.org.uk/documents/aa110000003/the-babbage-papers%3e" target="_blank">https://collection.sciencemuseumgroup.org.uk/documents/aa110000003/the-babbage-papers></a> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">* Digitised archive of Babbage papers including full technical archive and Notebooks. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><a href="https://collection.sciencemuseumgroup.org.uk/documents/aa110000003/the-babbage-papers" target="_blank">https://collection.sciencemuseumgroup.org.uk/documents/aa110000003/the-babbage-papers</a> <<a href="https://collection.sciencemuseumgroup.org.uk/documents/aa110000003/the-babbage-papers%3e" target="_blank">https://collection.sciencemuseumgroup.org.uk/documents/aa110000003/the-babbage-papers></a> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Charles Babbage’s Difference Engines and the Science Museum | Science Museum <<a href="https://www.sciencemuseum.org.uk/objects-and-stories/charles-babbages-difference-engines-and-science-museum%3e" target="_blank">https://www.sciencemuseum.org.uk/objects-and-stories/charles-babbages-difference-engines-and-science-museum></a> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">* Short contextual and historical summary. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">* Links to the Technical Description and User Manual are in Further Reading. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><a href="https://www.sciencemuseum.org.uk/objects-and-stories/charles-babbages-difference-engines-and-science-museum" target="_blank">https://www.sciencemuseum.org.uk/objects-and-stories/charles-babbages-difference-engines-and-science-museum</a> <<a href="https://www.sciencemuseum.org.uk/objects-and-stories/charles-babbages-difference-engines-and-science-museum%3e" target="_blank">https://www.sciencemuseum.org.uk/objects-and-stories/charles-babbages-difference-engines-and-science-museum></a> <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Citation: <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Swade, Doron, Charles Babbage's Difference Engine No. 2: Technical Description. Science Museum, 2023. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Swade Doron, Charles Babbage's Difference Engine No. 2: User Manual. Science Museum, 2023. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Best wishes <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt">Doron Swade <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:36pt"><u></u> <u></u></p></div></div></div>_______________________________________________<br>
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