17.a HARRISON'S PRINCIPLES OF HIS TIME-KEEPER. +Plates.+
1767. 4to. 5_s._
18. HUTTON'S TABLES OF THE PRODUCTS AND
POWERS OF NUMBERS. 1781. Folio. 7_s._ 6_d._
19. LAX'S TABLES FOR FINDING THE LATITUDE AND LONGITUDE. 1821.
8vo. 10_s._
20. LUNAR OBSERVATIONS at GREENWICH. 1783 to 1819. Compared
with the Tables, 1821. 4to. 7_s._ 6_d._
22. MASKELYNE'S ACCOUNT OF THE GOING OF HARRISON'S WATCH. 1767.
4to. 2_s._ 6_d._
21. MAYER'S DISTANCES of the MOON'S CENTRE from the PLANETS.
1822, 3_s._; 1823, 4_s._ 6_d._ 1824 to 1835, 8vo. 4_s._ each.