| Reference Number | WJTS/2/4 |
| Title | 7 - Decrease in population, 1841-1911 |
| Date | [1910s] |
| Creator Name | Mason, Thomas Holmes, 1877-1958 |
| Thompson, Sir William John, 1861-1929 |
| Description | Glass lantern slide showing the percentage decrease in Irish population by decade between 1841 and 1911. |
| Extent | 1 slide |
| Term | Censuses |
| Population Characteristics |