| Huruluwewa Irrigation Reservoir | Arumugam | Ceylon Today | 1955 | IV | 5 & 6 | 34 - 36 | General |
| Hybridization & Some Aspects of Behaviour in the Ceylon Jungle Fowl | Deraniyagala | Spolia Zeylanica | 1958 | 28 | 2 | 175 - 179 | General |
| Hydraulic Society of Ancient Ceylon, The: Speculations on the Factors Contributing towards Relative Stasis in its Socio-economic Structure | Roberts | N/A | N/A | N/A | N/a | 23 - 33 | General |
| Hydro Power Potential & Its Development | Mendis | Ceylon Today | 1964 | 12 | 10 | 12 - 15 | General |
| I Met the Sigirya Damsels | Jayakody | Times of Ceylon Annual | 1957 | N/A | N/A | N/A | History |
| I Remember Ceylon | Soulbury | Times of Ceylon Annual | 1963 | N/A | N/A | N/A | General |
| Ibn Batuta 1304 - 1378 A.D. | Weinman | Journal of the D.B.U. | 1928 | XVII | 4 | 156 -162 | History |
| Ideals of the Public Service, The | Ranasinha | Ceylon Today | 1952 | 1 | 4 | 5 - 7 | General |
| Identification of Venomous Snakes of Sri Lanka | De Silva | Loris | 1972 | XII | 6 | 288 - 293 | General |
| Identity of the Name Crocodylus Natans Meyer 1795, The | Wermuth | Spolia Zeylanica | 1960 | 29 | 1 | 24 - 27 | General |
| Ideological Pinnacle of Sinhalese Language Nationalism, The - 1 | Dharmadasa | Ceylon Journal of Historical & Social Studies, The | 1978 | 8 (New Series) | 2 | 1 - 16 | General |
| Ilavar and Lankans, Emerging Identities in a Fragmented Land | Schalk | Asian Ethnicity | March 2002 | 3 | 1 | 47 - 62 | General |
| Image of an Island, The - Old Maps | Fernando | Tourists' Ceylon | 1968 | 2 | 1 | 3 - 11 | General |
| Image, The - 'Pre-eminent From Head to Foot' | Saparamadu | Ceylon Observer Pictorial | 1973 | N/A | N/A | N/A | Religion |
| Immediate Impact of the First Railway in Sri Lanka, The | Munasinghe | University of Colombo Review | 1987 | 7 | N/A | 39 - 51 | General |
| Impact of High Yielding Varieties of Rice on a Settlement Scheme in Ceylon, The | Amerasinghe | Modern Ceylon Studies | 1972 | 3 | 1 | 19 - 35 | General |
| Impact of the Waste Lands Legislation & the Growth of Plantations on the Techniques of Paddy Cultivation in British Ceylon,The: A Critique | Roberts | Modern Ceylon Studies | 1970 | 1 | 2 | 157 - 198 | History |
| Importance of Dutch Rule in Ceylon, The | Mendis | Journal of the D.B.U. | 1955 | XLV | 4 | 129 - 133 | History |
| Importance of Rice in our Economy, The | Kalpage | Ceylon Today | 1965 | 14 | 12 | 5 - 11 | General |
| Important Medicinal Plants Component of the Sri Lanka Flora | Ekanayake | Loris | 1984 | XVI | 6 | 276 -280 | General |
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