Contents

1. OUT OF THE WHALE-DREAM... 5

2. SHIRTS AND SKINS. 13

3. GESTALT. 22

PART II 30

4. VIRTUAL IMAGE. 31

5. REFRACTION.. 38

6. RETARDATION AND DIFFRACTION.. 41

PART III 46

7. INTERFERENCE. 47

8. REFLECTION.. 51

9. REMEMBERING THE GREAT AUK.. 60

PART IV.. 67

10. HEAT. 68

11. TURBULENCE. 75

12. GRAVITY.. 78

13. UNDER THE SUN.. 90

PART V.. 94

14. THE DEEPEST OCEAN.. 95

15. OF LIFE AND DEATH . . .109

16. . . . AND APPARITIONS. 122

PART VI 133

17. SHADOW... 134

18. FOCUS. 141

19. IN THE PARLOR.. 148

20. MODERN MEDICINE. 157

PART VII 162

21. DEJA PENSE. 163

22. DELEGATION.. 171

PART VIII 177

23. AN EXCITED STATE. 178

24. SPONTANEOUS EMISSION.. 183

25. A TRAPPED STATE. 191

PART IX.. 200

26. TUNNELING.. 201

27. EXCITATION.. 205

28. STIMULATED EMISSION.. 209

29. ABSORPTION.. 215

PART X.. 219

30. OPACITY.. 220

31. PROPAGATION.. 222