Among its characteristics the following points are noticeable.
The general characteristics of the distribution effected by these gears are similar.
Yet again the Andamanese can be grouped according to certain salient characteristics: the forms of the bows and arrows, of the canoes, of ornaments and utensils, of tattooing and of language.
All types of valves are with few exceptions operated by a link motion, generally of the Stephenson type, occasionally of the Allan type or the Gooch type, or with some form of radial gear as the Joy gear or the Walschaert gear, though the latter gear has characteristics which ally it with the link motions.
The relatively small size of the ear is one of the most distinctive characteristics of the dwarf race.