27.---- SELECTIONS FROM THE ADDITIONS up to 1812. 8vo. 5_s._
1834-54. 8vo. 5_s._
28.---- SUPPLEMENTS, 1828 to 1833, 1837 and 1838. 8vo. 2_s._
each.
29.---- TABLE requisite to be used with the N.A. 1781. 8vo.
5_s._
30. POND'S ASTRONOMICAL OBSERVATIONS. 1811 to 1835. 4to. 21_s._
each.
31. RAMSDEN'S ENGINE for +Dividing Mathematical Instruments+.
4to. 5_s._