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Light-house Lights, a Method of in- 
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—— Notes on the Vartry Water in 
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Phellia Sollia. A New Species of Ac- 
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Photographic Dry Plate, Influences of 
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Physics, Useful Methods in Teaching 
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Pitchstone and Andesite from Tertiary 
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Planets and Satellites, Atmospheres 
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Pogotrichum hibernicum, n. sp. (Joun- 
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Polychets collected during the Royal 
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Preston (Thomas). Application of the 
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A Lecture Note on the Relation 
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Protractor in Field-Geology, Use of 
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Pucksia Mac Henryi, a New Fossil 
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Pycnogonida from the Irish Coasts 
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