| ID volume | volume | volume (sub)title | tables | year(s) | indexed illustrations | link contributor | ID archive.org | info |
|---|
| 250257 | vol. 1 |   | | | | | | |
| 250258 | vol. 2 |   | | | | | | |
| 250259 | vol. 3 |   | | | | | | |
| 250260 | vol. 4 |   | | | | | | |
| 250261 | vol. 5 |   | | | | | | |
| 250262 | vol. 6 |   | | | | | | |
| 250263 | vol. 7 |   | | 1890 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios7huth | |
| 250264 | vol. 8 |   | | 1891 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios8huth | |
| 250265 | vol. 9 |   | | 1892 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios9huth | |
| 250266 | vol. 10 |   | | 1893 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios9huth | |
| 250267 | vol. 11 |   | | 1894 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios11huth | |
| 250268 | vol. 12 |   | | 1895 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios11huth | |
| 250269 | vol. 13 |   | | 1896 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios11huth | |
| 250270 | vol. 14 |   | | 1897 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios14huth | |
| 250271 | vol. 15 |   | | 1898 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios14huth | |
| 250272 | vol. 16 |   | | 1899 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios14huth | |
| 250273 | vol. 17 |   | | 1900 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios14huth | |
| 250274 | vol. 18 |   | | 1901 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios14huth | |
| 250275 | vol. 19 |   | | 1902 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios14huth | |
| 250276 | vol. 20 |   | | 1903 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios14huth | |
| 250277 | vol. 21 |   | | 1904 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios21huth | |
| 250278 | vol. 22 |   | | 1905 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios21huth | |
| 250279 | vol. 23 |   | | 1906 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios21huth | |
| 250280 | vol. 24 |   | | 1907 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios21huth | |
| 250281 | vol. 25 |   | | 1908 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios21huth | |
| 250282 | vol. 26 |   | | 1910 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios21huth | |
| 250283 | vol. 27 |   | | 1913 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios27huth | no illustrations |
| 250284 | vol. 28 |   | | 1916 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios27huth | no illustrations |
| 250285 | vol. 29 |   | | 1926 | | Smithsonian Institute, Washington, D.C., U.S.A. | https://archive.org/details/helios27huth | no illustrations |
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