the 'Trigonometrical Operation. 
2 57 
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S.W. pinnacle of the S. tower 
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39 42 24.5 
78 30 8,5 
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97 44 59-3 
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Charlotte Street Chapel 
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Small- Pox Hofpital 
lOg l6 3O 
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Vol. LXXX. L 1 N° 
