The Nilometer, Island Of Rhoda, Egypt In The 19th Century. A Nilometer Was A Structure For Measuring The Nile River's Clarity And Water Level During The Annual Flood Season. From The Imperial Bible Dictionary, Published 1889. Bring character to any room with unique art decor for your home interior or office. Purchasing fine art or decorative products from Printscapes ensures proper compensation to artwork and image creators. Products backed by 100% quality and workmanship guarantee.