Hooke's Scientific Observations and Discoveries

3. Hooke’s observation in Micrographia of part of the moon’s surface (top). He included for comparison (below) two observations of the same place by his contemporaries: one by Hevelius (left) and another by Riccioli (right)

4. Hooke’s equatorial quadrant

5. The air pump and associated apparatus designed and used by Hooke in Boyle’s experiments – but not used for the measuremements that led to Boyle’s Law

6. Hooke’s scientific measurements • Boyle’s Law Micrographia (1665)

7. Hooke’s Micrographia (1665) detail

8. 8 feet (c.3.8 m) 0 12 inches 0 (c. 305 mm)

9. P0 V0

10. P0 P0 V1 V0 P1

11. P0 P0 P0 H2 V2 V1 V0 H1

12. V P0 P P (hypothetical) H Robert Boyle’s A Defence ... (1662)

13. Hooke’s scientific measurements (b) Gravity Weighing at different heights above and below the ground A differential gravimeter based on a cantilevered spring

14. Two experimental verifications of the inverse square law of gravitational attraction based on timing a falling weight First successful attempt: Speake et al (1994) Hooke’s 1664 (failed) attempt

18. ‘Ogilby & Morgan’s’ (actually Hooke’s) 1/1200 plan (part) 1676 The ‘Copperplate Map’ (part) c. 1555

20. John Holwell’s A Sure Guide published 1678

22. John Holwell’s A Sure Guide published 1678

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