Talking like a sailor (II) Published on April 8, 2025April 6, 2025 by fivecolorssandt@icloud.com The answers A good sailor is never without a clew. Read More
Old methods Published on February 11, 2025February 10, 2025 by fivecolorssandt@icloud.com It’s getting harder Some long-established habits are getting difficult to maintain. Read More
The lateen rig Published on October 24, 2023October 22, 2023 by fivecolorssandt@icloud.com A misunderstood sail We consider a number of mistakes connected with a particular piece of old technology. Read More
A simpler theory (II) Published on July 11, 2023July 9, 2023 by fivecolorssandt@icloud.com Writing down the equation We notice how mathematical notation affects scientific progress. Read More
Liquids in space? Published on September 13, 2022September 11, 2022 by fivecolorssandt@icloud.com Chemical calculations An offhand comment led to a set of hybrid calculations. Read More
Take note Published on July 19, 2022July 18, 2022 by fivecolorssandt@icloud.com From the archives Our consultants review some old writings. Read More
The march of historians Published on May 10, 2022May 8, 2022 by fivecolorssandt@icloud.com History ain’t changed? Insights from an old history book. Read More
Touching history Published on January 25, 2022January 25, 2022 by fivecolorssandt@icloud.com A human chain We find that long ago may not be so long ago. Read More
The infinite answer Published on May 18, 2021May 16, 2021 by fivecolorssandt@icloud.com Terms of the series We emphasize, again, two different kinds of mathematics. Read More
Historical fiction (I) Published on July 28, 2020July 26, 2020 by fivecolorssandt@icloud.com Getting old things right We note some similarities between genres: SF and HF. Read More