SUPPLEMENTARY NUMBER. 



Vol « 17 - No. 109. 



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1\}H 20 THE 



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PHILOSOPHICAL MAGAZINE, 



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JOURNAL OF SCIENCE. 



Being a Continuation of TillocKs 'Philosophical Magazine, 

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FIFTH SERIES. 



N° 109.— SUPPLEMENT. JUNE 1884. 

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Illustrative of Prof. g. P. Thompson's Paper on a Modified 

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