LSJ
ή, όν, appertaining to method, [λόγος], title of work by Archimedes, Hero Metr. 1.32. Adv. -κῶς systematically, Ptol. Tetr. 106.
of an inspector, λειτουργίαι PTeb. 32.4 (ii BC), etc. ; μέτρῳ ἐφοδικῷ dub. in ib. 208 (i BC).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)