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.
| Name. | Shape. | Normal measurements. | Remarks. |
|---|---|---|---|
| Tous les mois | Oval, with flat ends | 0.00370 to 0.00185 | Hilum annular, near one end and incomplete rings. |
| Potato | Oval | 0.00270 to 0.00148 | Hilum annular, rings incomplete, shape and size very variable. |
| Bermuda arrowroot | Sack-shaped | 0.00148 to 0.00129 | Hilum distinct annular, shape variable, rings faint. |
| St. Vincent arrowroot | Oval-oblong | 0.00148 to 0.00129 | Hilum semi-lunar, rings faint, shape not very variable. |
| Natal arrowroot | Broadly ovate | 0.00148 to 0.00129 | Hilum annular, in center and well marked complete rings. |
| Galangal | Skittle-shaped | About 0.00135 | Hilum elongated, very faint incomplete rings. |
| Calumba | Broadly pear-shaped | ” 0.00185 | Hilum semi-lunar, faint but complete rings, shape variable. |
| Orris root | Elongated-oblong | ” 0.00092 | Hilum faint, shape characteristic. |
| Turmeric | Oval-oblong, conical | ” 0.00148 | Very strongly marked incomplete rings. |
| Ginger | Shortly conical, with rounded angles. | ” 0.00148 | Hilum and rings scarcely visible, shape variable but characteristic. |
Group II: With strongly developed hilum more or less stellate.
| Name. | Shape. | Normal measurements. | Remarks. |
|---|---|---|---|
| Bean | Oval-oblong | About 0.00135 | Fairly uniform. |
| Pea | Like bean | 0.00111 to 0.00074 | Very variable in size,with granules under preponderating. |
| Lentil | Like bean | About 0.00111 | Hilum, a long depression seldom radiate. |
| Nutmeg | Rounded | ” 0.00055 | The small size and rounded form distinctive. |
| Dari | Elongated hexagon | ” 0.00074 | Irregular appearance and great convexity distinctive. |
| Maize | Round and polygonal | ” 0.00074 | The rounded angles of the polygonalgranules distinctive. |
Group III: Hilum and rings practically invisible.
| Name. | Shape. | Normal measurements. | Remarks. |
|---|---|---|---|
| Wheat | Circular and flat | 0.00185 to 0.00009 | Very variable in size and very dull polarization in water. |
| Barley | Slightly angular circles | About 0.00073 | The majority measuring about 0.00373 distinctive, and a few four times this size. |
| Rye | Like barley | 0.00148 to 0.00009 | Small granules, quite round, and here and there cracked. |
| Jalap | Like wheat | Polarizes brightly in water. | |
| Rhubarb | do. | 0.00055 to 0.00033 | Polarizes between jalap and wheat, and runs smaller and more convex. |
| Senega | Like wheat | 0.00148-0.00009 | Measurements the only guide. |
| Bayberry | do. | 0.00074-0.00011 | |
| Sumbul | do. | 0.00074-0.00009 | |
| Chestnut | Very variable | 0.00090-0.00009 | Variable form, and small but regular size, distinctive. |
| Acorn | Round-oval | About 0.00074 | Small and uniform size, distinctive. |
| Calabar bean | Oval-oblong | 0.00296 to 0.00180 | Large size and shape characteristic. |
| Licorice | Elongated-oval | About 0.00018 | Small size and shape distinctive. |
| Hellebore (green or black) | Perfectly rotund | 0.00037 to 0.00009 | Small, regular size and rotundity, distinctive. |
| Hellebore (white) | Irregular | 0.00055 to 0.00009 | Irregular shape and faint central depression, distinctive. |