C >28 3 
V. A Supplement to the Measures of Trees , printed in the 
Philosophical Transactions for 1 759. By Robert Marsham, 
Esq. F. R. S. 
Read December 22, 1 796. 
These measures were all taken by myself, except the second, 
of the ash in Scotland ; and that I believe is fair. As that is 
the largest ash, and as thriving as any I had seen, I was de- 
sirous to procure a second measure of it. The measures 
(where there w&s no impediment) were taken at five feet 
from the earth, as the easiest height to run the line even, and 
a fair height for the bulk of the body. For most trees (at 
least oaks and chesnuts) are frequently found to be one-third 
more in circumference at one foot than at five. Where I have 
measures of more than one tree of the same kind, I give the 
largest and a smaller, to show the different proportion of the 
increase of their different sizes : and as trees standing single 
generally increase more than those in groves, I mark them 
with an S. and a G. as the difference is more than would be 
expected by those that think little of trees. 
In 1719 I had about two acres sowed with acorns, and from 
1729 to 1770 I planted oaks from this grove, always leaving 
the best plants standing for the future grove : but most of the 
transplanted trees are already larger than those that were not 
removed; the largest of which is now (1795) but five feet 
