ocr: Here Leonardo discusses the sediment carried by rivers and where various kinds of this sediment are deposited, He also records ideas for draining swamps, asubject on which his expertise was frequently sought. The writing has the flavor of at technical manual forh hydraulic engineers. It is a far cry from his philosophical musings or evocative poetic descriptions about the body of the earth found elsewhere in the codex. Leonardo rarely makes sketches within the text, preferring to illustrate his major points in the outer margin with substantiating explanations.
