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| Alphabetical [« »] dew 1 did 2 difference 2 difficult 3 difficulty 1 diligent 1 diligently 1 | Frequency [« »] 3 certain 3 clearly 3 commonly 3 difficult 3 divine 3 doubt 3 earth | Roger Bacon On Experimental Science IntraText - Concordances difficult |
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1 12| or imprudence; for it is difficult to have astronomical implements 2 12| sufficiently exact and more difficult to have tables absolutely 3 12| The use of these tables is difficult, but the use of the instruments