Nouricce and Checker Boards

[Alan]

In Donald Hudson's combat report from 1 August 1918, he, along with elements of the 27th Aero, was in a big dogfight. At one point, he states:

"...My engine was boiling and I could not climb as my Nouricce was empty, and by using the hand pump I could just keep going."

Is the nouricce some kind of radiator? Why would it need pumping?

-also-

I got this from James J. Hudson's Hostile Skies A Combat History of the American Air Service in World War I, page 114. He mentions that the 27th was attacked by eight "Checker Board Squadron" Fokkers, as well. He footnotes in the next sentence that "According to research by the editors of Cross and Cockade Journal, these planes were from Jagdstaffeln 17,4, 6, and 10, all top-quality units of the German Air Force."

In my limited knowledge, I'm pretty sure the Checker Board Fokkers are not of Jasta 4. Who were they then?