I. Granules entirely angular.
1. Many with prominent nucleus: At most 0.0066 mm, _rice starch_:
2. Without a nucleus: The largest 0.0088 mm, _millet starch_:
II. Among the many-angled also rounded forms.
_a._ No drum-shaped forms present, angular form predominating.
1. Without nucleus or depression very small; 0.0044 mm,
_oat starch_:
2. With nucleus or depression; 0.0132-0.0220 mm.
_a._ Nucleus or its depression considerably rounded;
here and there the granules united into differently
formed groups; _buckwheat starch_:
_b._ Nucleus mostly radiate or star-shaped; all the
granules free; _maize_ (_corn_) _starch_:
_b._ More or less numerous kettledrum and sugar-loaf like forms.
1. Very numerous eccentric layers; the largest granules
0.022-0.0352 mm, _batata_ (sweet potato) _starch_:
2. Without layers or rings; 0.008-0.022 mm.
_a._ In the kettledrum-shaped granules the nucleal
depression mostly widened on the flattened
side; 0.008-0.022 mm, _cassava starch_:
_b._ Depression wanting or not enlarged.
_aa._ Nucleus small, eccentric; 0.008-0.016 mm,
_pachyrhizus starch_:
_bb._ Nucleus small, central, or wanting.
_aaa._ Many irregular angular forms;
0.008-0.0176 mm, _sechium starch_:
_bbb._ But few angular forms; some with
radiate, nucleal fissure; 0.008-0.0176 mm,
_chestnut starch_.
_C._ Granules simple and compound; predominant forms, oval, with
eccentric nucleus and numerous layers; the compound granule made up
of a large granule and one or more relatively small kettledrum-shaped
ones; 0.025-0.066 mm, _sago starch_.
=198. Muter’s Table for the Detection of Starches when Magnified about
230 Diameters.=
[All measurements are given in decimals of an inch.]
_Group I_: All more or less oval in shape and having both hilum and
rings visible.
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