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Yet the examination of these returns is not altogether useless , inasmuch as it affords a criterion of the comparative correctness of certain series of facts collected in such investigation . The Respondent argues , however , that the adornment of the uniform involves the exercise of various management rights under section 7106 ( a ) ( 1 ) of the Statute . " Perc is a very dangerous chemical that threatens the health of workers and owners of dry cleaning facilities . - Last night had a fine view of Alpha Lyrae , whose disk , through our captain 's spy-glass , subtends an angle of half a degree , looking very much as our sun does to the naked eye on a misty day .