A set of 6 volumes of the nearly century-old American Biological Natural Encyclopedia

A set of nearly a century-old American Biological Natural Encyclopedia (6 volumes) Size: 29*21cm (quite a large volume) Years: 1917~1923 # As the weight exceeds 10kg, convenience store pickup is unavailable. Please select postal delivery. Published in 1917, this set includes 3 first editions and 3 copies from the 1923 edition. The content is complete with no missing pages. However, as this appears to be an educational book for children's biology, there are numerous signs of wear and tear that have been repaired (as shown in the last image). Much like the well-loved animal encyclopedias from our childhoods, this set bears its history, with the more significant damages carefully mended. This ensures that the books can still be read and appreciated. The pages feature a mix of black and white illustrations, colored plates, and textual descriptions of various organisms, making it a rather fine set for display and reading. Please note that old books inevitably carry traces of history; purchase only if you are able to accept this.