Larix Americana (Tamarack), p. 2

Larix Americana (Tamarack).

Age [unknown] 190 years. Diameter 12 inches.

It requires 190 years for a tamarack to grow it the diameter of one foot, though it grows to half that diameter. 40 years!!

Mean growth in 10 years counting 40 years from beginning.

[Notes, data, and sketches].