ANNUAL ADDRESS OF THE PRESIDENT. 
LXVII 
NOTE A. 
The appended table exhibits the principal comparisons hitherto 
made of the more important early English standards of length. 
The significations of the reference numbers, and the authorities for 
the descriptions of the standards, are as follows: 
No. 1. Standard yard of Henry VII (1490); an end measure 
formed of an octagonal brass rod half an inch in diameter. 
No. 2. Standard yard of Queen Elizabeth (1588); an end meas¬ 
ure formed of a brass rod six-tenths of an inch square. 
No. 3. Matrix to Queen Elizabeth’s standard yard (1588); of 
brass, li inches wide, 1 inch thick, and 49 inches long. 
No. 4. Standard ell of Queen Elizabeth (1588); an end meas¬ 
ure of brass, six-tenths of an inch square. 
No. 5. Standard yard of the Clock-makers’ Company (1671); a 
matrix, formed by two pins in an octagonal brass rod half an inch 
in diameter. 
No. 6. Standard yard at the Tower; a line measure, marked on 
a brass bar seven-tenths of an inch square and 41 inches long. 
No. 7. Graham’s Royal Society scale (1742); a line measure, 
on a brass bar half an inch wide, one-quarter of an inch thick, and 
42 inches long. Line marked E. Mem. Roy. Ast. Soc., Vol. 9, p. 82. 
No. 8. Ditto. Line marked Exch. 
No. 9. Ditto. Paris half toise; marked F. 
Numbers 1 to 9 are described in the Philosophical Transactions, 
1743, pp. 547-550. 
No. 10. Bird’s standard yard of 1758; a line measure, on a 
brass bar 1*01 inches square, and 39 06 inches long. Mem. Roy. 
Ast. Soc., Vol. 9, p. 80. 
No. 11. Bird’s standard yard of 1760; a line measure, on a 
brass bar 1*05 inches square, and 39'73 inches long. Mem. Roy. 
Ast. Soc., Vol. 9, pp. 80-82. 
No. 12. General Roy’s scale; a line measure, upon a brass bar 
0*55 of an inch broad, about 0*22 of an inch thick, and 42*8 inches 
