Part 3

31. INNER CORONA ECLIPSE OF 1869 40

32. SKETCH OF OUTER CORONA, 1869 41

33. TACCHINI’S DRAWING OF CORONA OF 1870 43

34. WATSON’S NAKED-EYE DRAWING OF CORONA OF 1870 44

35. PHOTOGRAPH SHOWING COMMENCEMENT OF OUTER CORONA 45

36. ECLIPSE OF 1857, DRAWING BY LIAIS 48

37. ENLARGEMENT OF PART OF FIG. 38 49

38. FAC-SIMILE OF PHOTOGRAPH OF CORONA OF 1871 51

39. “SPECTRES” 54

40. OUTER CORONA OF 1878 57

41. SPECTROSCOPE SLIT AND SOLAR IMAGE 59

42. SLIT AND PROMINENCES 59

43. TACCHINI’S CHROMOSPHERIC CLOUDS 62

44. TACCHINI’S CHROMOSPHERIC CLOUDS 62

45. VOGEL’S CHROMOSPHERIC FORMS 64

46. TACCHINI’S CHROMOSPHERIC FORMS 66

47. ERUPTIVE PROMINENCES 67

48. SUN-SPOTS AND PRICE OF GRAIN 77

49. SUN-SPOT OF NOV. 16, 1882, AND EARTH 80

50. GREENWICH RECORD OF DISTURBANCE OF MAGNETIC NEEDLE, NOV. 16 AND 17, 1882 81

51. SUN-SPOTS AND MAGNETIC VARIATIONS 87

52. GREENWICH MAGNETIC OBSERVATIONS, AUG. 3 AND 5, 1872 89

53. ONE CUBIC CENTIMETRE 93

54. POUILLET’S PYRHELIOMETER 93

55. BERNIÈRES’S GREAT BURNING-GLASS 103

56. A “POUR” FROM THE BESSEMER CONVERTER 105

57. PHOTOMETER-BOX 108

58. MOUCHOT’S SOLAR ENGINE 109