The scars on trees grow to a greater thickness than is required by
the sap of the limb which nourishes them.
399.
The plant which gives out the smallest ramifications will preserve
the straightest line in the course of its growth.
[Footnote: This passage is illustrated by two partly effaced
sketches. One of these closely resembles the lower one given under
No. 408, the other also represents short closely set boughs on an
upright trunk.]
400.