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• s  of inferior quality

• But low-grade oxide ores, like Nevada's, evaded all ordinary flotation methods until the Bureau of Mines men hit on a new scheme: flotation in reverse with a new solvent.
• The Great Marine Spy Scandal had started in December 1986, when another Moscow embassy guard, Sergeant Clayton Lonetree, told a CIA officer that he had given low-grade classified .
• Thomas Edison once tried magnetic concentration of low-grade iron ore, as Henry Ford discovered in the records of Edison's Menlo Park Laboratory while rebuilding it in his .

News & Articles

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• Prostate Cancer Doesn't Always Benefit from Treatment
  Many men who have been diagnosed with low-grade prostate cancer can safely choose careful monitoring instead of immediate treatment, according to a study from the Dana-Farber Cancer Institute and Massachusetts General Hospital.
  June 18, 2013 - ThirdAge

Quotes

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• Barry McCaffrey in Washington Post
  Well, Matt, to be honest, I've been calling it a civil war, low-grade conflict, for 18 months,said retired Gen. Barry McCaffrey, an NBC News consultant.
• Norm Coleman in USA Today
  The reality is that it is easier to buy low-grade radioactive material for a dirty bomb than it is to buy cold medicine that has been restricted because of the meth epidemic,Coleman said. "The operation demonstrated that the Nuclear...
• Grant Hackett in The Australian
  I have never had what you would call an asthma attack but the doctors think I've always been a low-grade asthmatic,Hackett said. "They say I just got used to having my breathing inhibited, and that it Is exacerbated by swimming so hard and...