I’m not entirely sure what this chemistry drawing is showing us. The description from the accompanying text was as follows: “The apparatus employed is represented in Fig. 3: a, is an apparatus producing a constant supply of carbonic acid. Upon opening Mohr’s clamp, g, the gas passes into the flask h, which contains sulphuric acid; it is then conducted, by means of the tube i, into the reduction tube k, which has an interior diameter of 8 mm.”
If you’re looking for vintage science images, I’m not so sure the exact purpose of this equipment setup matters. There’s so many different beakers, tubes and other stuff that it might be a great addition to a scrapbook page or other work where a bit of nerdy science goodness is needed.
Considering the name of the book and that the paragraph which accompanied this illustration, I suspect it might be better not sharing exactly what this equipment does. The title of the book was Legal Chemistry: A Guide to the Detection of Poisons, Examination of Tea, Stains, Etc.. It was published in 1884. The copyright notice listed 1876. The author did not identify an illustrator which places this piece under the 120 years after publication aspect of international copyright law for an item to fall into the public domain.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.
