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| Author | Title | Year  |
Publication | Volume | Pages |
|---|---|---|---|---|---|
| Columella, L.J.M. | Of husbandry | 70 | Book 9 | ||
| Guillemin, A. | The Heavens: An Illustrated Handbook of Popular Astronomy | 1867 | |||
| Wallace, A. R. | The Malay Archipelago the land of the orang-utan and the bird of paradise: a narrative of travel, with studies of man and nature | 1869 | |||
| Tyndall, J. | The Electric Light | 1879 | Fortnightly review | 25 | 197-216 |
| Siemens, C.W. | III. On the influence of electric light upon vegetation, and on certain physical principles involved | 1880 | Proceedings of the Royal Society of London | 30 | 210-219 |