This digital archive contains historic publications on the colour and clarity of water written between the 17th and early 20th century - Read more

Papers and books, collected by M.R. Wernand (Royal Netherlands Institute for Sea Research) over a period of 20 years contain paper prints and digitized books from several digital libraries. All books and papers (in English, German, French, Italian and Dutch) are in PDF format and freely downloadable for scientific use. This archive can be extended with historic books or papers by individual upload.