Colloids and the Ultramicroscope - Richard Zsigmondy - Google Books

https://books.google.de/books?id=Ac2mGhqjgUkC&pg=PA69#v=onepage

PREFACE. THE Author of this very practical treatise on Scotch Loch - Fishing desires clearly that it may be of use to all who had it. He does not pretend to have written anything new, but to have attempted to put what he has to say in as readable a form as…