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VOLUME I. (SERIES IL) 
11.—On the Energy expended in Propelling a Bicycle. By G. Jounstonn Stoney, : 
SC. F.R.S., 4 Vice-Prestpenr or run Socmry; ann G. Guratp Sronny.—Witn 
ames XXXIX,, XL, and XLT. : : 
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SHED BY THE ROYAL DUBLIN SOCIETY, 
‘ALEX, THOM & CO, 87, 88, & 89, ABBEY-STREET, 
‘THE QUEEN'S PRINTING OFFICE. — 
OR HER MAJESTY’S STATIONERY OFFICE, 
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