Given that today is the winter solstice I thought to have a look at some artwork or imagery depicting the sun. I went to bookcase where there were some astronomy books and plucked out one at random--it turned out to be Denison Olmsted's (1791-1859) Practical Astronomy textbook sort of written for his 12 students at Yale in 1839 (and bound with Ebenezer Porter Mason's Introduction to Practical Astronomy, which was a supplement published ten years later). Its a fine not-big/not-little book (320 pages plus Mason's 135 pages), and it still reads pretty well. (There's also a very sweet 16-page outline of the course he taught, breaking the lectures down into fairly small chunks. There's an interesting part of lecture XII entitled "DANGERS" which addresses heat and cold and bad business that could come from "perturbations of the moon and planets" and comets, of course, particularly the one like the "threatening circumstances attending the great comet of 1843". As it happens the only annotation made by the 19th century owner of this book was right here, in the danger section, where they wrote the word again followed by five check/whatever marks.
There would of course be images of the sun in the book, and so was found this lovely small woodcut within the astronomical image (above), measuring in real life at about 5mm. There are a lot of lines on the circumference of this tiny circle.
The "S" stands for Sun.