ppl. a. (UN-1 8.)

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1816.  Scott, Bl. Dwarf, iv. I am unwilling to leave a matter uninvestigated which [etc.].

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1862.  Miller, Elem. Chem., Org. (ed. 2), iii. § 4. 244. It yields a liquid … the nature of which, however, is at present uninvestigated.

3