ON NINE BALLOON ASCENTS IN 1863 AND 1864. 



Balloon Ascent, from the Crystal Palace, June 27, 1864. 



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8. 



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17. 



(8) Tliii-ty Tibi-ations of horizontal magnet was observed in 48'9 seconds. 



(9) Sevenoaks on our level. (10) Crossing Sevenoaks line. 



(11) Can see Knoll House. 



(12) Ozone by paper was coloured to 2, that by powder 3. 



(13) Thirty vibrations of horizontal magnet was observed in 49'2 seconds. 



k2 



