History of the inductive sciences, from the earliest to the present time
CHAPTER VI.--THE INSTRUMENTS AND AIDS OF ASTRONOMY DURING THE
NEWTONIAN PERIOD.
_Sect._ 1. Instruments. 470 _Sect._ 2. Observatories. 476 _Sect._ 3. Scientific Societies. 478 _Sect._ 4. Patrons of Astronomy. 479 _Sect._ 5. Astronomical Expeditions. 480 _Sect._ 6. Present State of Astronomy. 481
_ADDITIONS TO THE THIRD EDITION._
INTRODUCTION 489