Sometimes you can oversand an outer area, but the fix is simple. Glue a small section of sheet stock to the base of the part and blend it in. Be sure that the entire surface of the sheet has a very thin coat of glue on it.
Two leading types may be distinguished amongst the Graptolites, which are termed respectively monoprionidian and diprionidian. The monoprionidian Graptolites, such as Monograptiis priodon (fig. 54), are distinguished by the fact that the polypary, whether simple or branched, possesses but a single row of cellules or hydrothecæ. In the diprionidian forms, on the other hand, as in Diplograptus (fig. 63), the polypary possesses a row of cellules on each side.
monoprionidian
diprionidian.
hydrothecæ.
Consideration of environmental effects is needed when choosing material.
Since low temperature is prevailing in hilly regions, tiled or asbestosed houses can be used to raise the room temperature.
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