Re: dark ages book

On 4/27/2025 2:56 PM, john larkin wrote:

 https://www.amazon.com/Medieval-Machine-Industrial-Revolution-Middle/dp/0140045147/ref=sr_1_1?s=books
 Cool book. Actually, a lot happened in the middle ages. Architecture,
engineering,  agricuture, machines, clocks, compasses, math, the
beginnings of real science.
 This is well researched and well written. The author preaches a bit in
the preface and epilogue, to the effect that at the time of writing
(1977!) most everything has been invented and progress was mostly
over.
 My copy was dumped by the UWE Redland library in Bristol England. It
hadn't been checked out much.
 

Here is a "dark ages" book, my (unfortunately, but perhaps understandably, slightly water-damaged) hardcopy of the 23rd edition of "Steam" by good ol' Babcock & Wilcox, complete with original promotional-copy receipt from March 16, 1891.
Part sales brochure and part textbook it has a number of handy design equations and tables for sizing boilers, fuel combustion temperatures, required chimney heights, etc.
<https://imgur.com/a/0mBF0ab>