Blog Redux: Secchi Disk Celebrates 150 Years of Clarity
Tomorrow will mark the one hundred and fifty-second birthday of the Secchi disk. We dusted off this post from two years ago to tell you all about our favorite scientific instrument. Enjoy! (Originally published April 20, 2015) – A time-honored instrument of limnology turns 150 today. The Secchi disk, the black and white plate at …