In scientific papers, the term "Figure" -- referring to an illustration in the text -- is often abbreviated as "Fig." But is "Figures" abbreviated as "Figs", "Fig.s" or "Figs."? I am proofreading a paper just now and the journal editors have used the abbreviation "Fig." for "Figure" and "Figs" (no period) for "Figures" as in "Figs 2 and 3".
Can anyone explain the convention of abbreviation as it applies in this case?