| Introduction to the Amphibia of Ceylon, An | Morgan-Davies | Loris | 1958 | VIII | 1 | 1 - 5 | General |
| Iron & Steel Project, The | Manicam | Ceylon Today | 1961 | 10 | 7 | 1 - 6 | General |
| Iron Ore in Matara District | N/A | Journal of the D.B.U. | 1966 | LVI | 1 - 4 | 52 | General |
| Irony of Ivory, The | Peiris | Loris | 1993 | XX | 2 | 56 - 60 | General |
| Irresistible Impulse | Jayaratnam | Colombo Law Review, The | 1979 | 5 | N/A | 103 - 114 | General |
| Irrigation Development in Ceylon | De S. Gunasekera | Ceylon Today | 1964 | 12 | 8 | 22 - 29 | General |
| Irrigation in Ceylon | Brohier | Journal of the D.B.U. | 1959 | XLIX | 1 & 2 | 6 - 11 | General |
| Irrigation in Ceylon - A Saga of Mastery Over Climate & Terrain | Brohier | Ceylon Today | 1954 | 3 | 3 & 4 | 41 - 46 | General |
| Irrigation Works of King Parakkamabahu 1, The | Nicholas | Ceylon Historical Journal, The | 1954 - 1955 | 4 | 1, 2, 3 & 4 | 52 - 68 | History |
| Is Buddhism Good for Your Health? | Hall | Mew York Times | 14 September 2003 | N/A | N/A | 1 - 6 | Religion |
| Is SAPTA the Best Possible Option for South Asia? A Quantitative Assessment with the GTAP Model | Bandara | Sri Lanka Studies Conference | 1999 | N/A | N/A | 1 - 35 | General |
| Is Whale-Watching in Contemporary Sri Lanka Feasible? | de Vos | Loris, Vol 23, No's 3 & 4, 2003 | 2003 | 23 | 3 & 4 | 43 - 47 | General |
| Istri Pura Limestone Cavern | Wickremaratne | Loris | 1984 | XVI | 5 | 247 - 249 | General |
| Jacob Burnand | N/A | Journal of the D.B.U. | 1967 | LVII | 1 - 4 | 54 | History |
| Jacob Burnand | Toussaint | Journal of the D.B.U. | 1930 | XIX | 5 | 194 - 199 | History |
| Jacob Haafner - A Sketch of his Life | Toussaint | Journal of the D.B.U. | 1928 | XVII | 3 | 93 - 105 | General |
| Jacob Haafner, Travels Through the Island of Ceylon in 1783 | Van Der Velde | Journal of the D.B.U. | 1992 | LXVI | 1 - 4 | 3 - 21 | History |
| Jaffna Burial Ground | N/A | Journal of the D.B.U. | 1935 | XXIV | 4 | 150 - 155 | General |
| Jaffna's Castle Forts | Brohier | Tourists' Ceylon | 1969 | 2 | 3 | 47 - 53 | History |
| Jaffna's Changing Scene | Gnanamuttu | Times of Ceylon Annual | 1957 | N/A | N/A | N/A | General |
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