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A file relating to the seismograph in Rathfarnham Castle. Includes letters from Fr William O'Leary SJ to Irish Fr Provincial Thomas V Nolan SJ concerning the construction of the seismograph.

Correspondence relating the seismic observatory at Rathfarnham Castle and to the transfer of the ‘O’Leary Seismograph’ to the museum at Maynooth College. Includes letters by Fr Richard E. Ingram SJ, Dr Thomas Murphy, Dublin Institute for Advanced Studies, and Irish Fr Provincial Patrick Doyle.