| Partial eclipse of the moon | Initial letter | [1] |
| A boy illustrating the phases of the moon | | [6] |
| Course of the moon in the heavens | | [8] |
| Chart of the moon | | [10] |
| Face of the full moon | | [11] |
| Tycho and his surroundings | (from a photograph by De la Rue) | [13] |
| Plan of the peak of Teneriffe | | [15] |
| The crater Copernicus | | [17] |
| The lunar Appennines | (from a photograph by M.M. Henri) | [19] |
| The crater Plato seen soon after sunrise | | [20] |
| Diagram of total eclipse of the moon | | [23] |
| Boy and microscope | Initial letter | [27] |
| Eye-ball seen from the front | | [30] |
| Section of an eye looking at a pencil | | [31] |
| Image of a candle-flame thrown on paper by a lens | | [33] |
| Arrow magnified by a convex lens | | [35] |
|
Student's microscope | |
[36] |
| Skeleton of a microscope | | [37] |
| Fossil diatoms seen under the microscope | | [39] |
| An astronomical telescope | | [41] |
| Two skeletons of telescopes | | [44] |
| The photographic camera | | [47] |
| Kirchhoff's spectroscope | | [51] |
| Passage of rays through the spectroscope | | [52] |
| A group of fairy-ring mushrooms | Initial letter | [55] |
| Three forms of vegetable mould magnified | | [61] |
| Mucor Mucedo greatly magnified | | [63] |
| Yeast cells growing under the microscope | | [65] |
| Early stages of the mushroom | | [67] |
| Later stages of the mushroom | | [68] |
| Microscopic structure of mushroom gills | | [69] |
| A group of cup lichens | Initial letter | [75] |
| Examples of lichens from life | | [77] |
| Singe-celled plants growing | | [78] |
| Sections of lichens | | [81] |
| Fructification of a lichen | | [83] |
| A stem of feathery moss from life | | [85] |
| Moss-leaf magnified | | [87] |
| Polytrichum Commune, a large hair-moss | | [88] |
| Fructification of a moss | | [89] |
| Sphagnum moss from a Devonshire bog | | [93] |
| Surface of a lava-flow | Initial letter | [96] |
| Vesuvius as seen in eruption | | [97] |
| Top of Vesuvius in 1864 | | [100] |
| Diagrammatic section of an active volcano | | [105] |
| Section of a lava-flow | | [108] |
| Volcanic glass with crystallites and microliths | | [109] |
| Volcanic glass with well-developed microliths | | [110] |
| A piece of Dartmoor granite | | [112] |
| Volcanic glass showing large included crystals | | [115] |
| A total eclipse of the sun | Initial letter | [117] |
| Face of the sun projected on a piece of cardboard | | [120] |
|
Photograph of the sun's face, taken by Mr. Selwyn | (Secchi, Le Soleil) | [122] |
| Total eclipse of the sun, showing corona and prominences | (Guillemin, Le Ciel) | [124] |
| Kirchhoff's experiment on the dark sodium line | | [128] |
| The spectroscope attached to the telescope for solar work | | [132] |
| Sun-spectrum and prominence spectrum compared | | [134] |
| Red prominences, as drawn by Mr. Lockyer 1869 | | [136] |
| A quiet sun-spot | | [140] |
| A tumultuous sun-spot | | [141] |
| A star-cluster | Initial letter | [145] |
| Some constellations seen on looking south in March from
six to nine o'clock | | [148] |
| The chief stars of Orion, with Aldebaran | | [149] |
| The trapezium θ Orionis | | [150] |
| Spectrum of Orion's nebula and sun-spectrum compared | | [151] |
| Some constellations seen on looking north in March
from six to nine o'clock | | [156] |
| The Great Bear, showing position of the binary star | | [157] |
| Drifting of the seven stars of Charles's Wain | | [159] |
| Cassiopeia and the heavenly bodies near | | [162] |
| ε Lyræ, a double-binary star | | [166] |
| A seaside pool | Initial letter | [172] |
| A group of seaweeds (natural size) | | [175] |
| ULVA LACTUCA, a piece greatly magnified | | [176] |
| Seaweeds, magnified to show fruits | | [177] |
| A Coralline and Sertularian compared | | [179] |
| Sertularia Tenella hanging in water | | [180] |
| Thuricolla Folliculata and
Chilomonas Amygdalum | | [182] |
| A group of living diatoms | | [184] |
| A diatom growing | | [185] |
| Cydippe Pileus, animal and structure | | [187] |
| The Sea-mat, Flustra Foliacea | | [191] |
| Diagram of the Flustra animal | | [192] |
| Dartmoor ponies | Initial letter | [195] |
| Equus Hemionus, the horse-ass of
Tartary and Tibet | | [201] |
| Przevalsky's wild horse | | [202] |
| skeleton of an animal of the horse-tribe | | [206] |
| Palæolithic man chipping flint tools | Initial letter | [209] |
| Scene in Palæolithic times | | [212] |
| Palæolithic relics—needle, tooth, implement | | [213] |
| Mammoth engraved on ivory | | [216] |
| Neolithic implements—hatchet, celt, spindle whorl | | [219] |
| A burial in Neolithic times | | [221] |
| British relics—coin, bronze celt, and bracelet | | [223] |
| Britons taking refuge in the cave | | [224] |