Show efrece of f on air tho the chano change which calces place in ili air during atio tit ne net t of respiration is very decided says tho the london 11 when taken in ill a dry state tile tho atmosphere in ili country places and rural districts contains from SOJO 0 06 to 2093 2098 20 98 per cent of oxygen and only OIO per percent cent of carbonic acid and in town districts from froin 2087 to 2000 percent per cent of oxygen ind and 1 1 per cent of carbonic acid the proportion of tho the latter is ia therefore very small and indeed is only 4 parts p larig in or I 1 in 2500 parts but when tho air air is breathed brea out again it contains only about 1850 per cent of oxygen and per cont cent of carbonic car bonio bonto acid so that whilo while thu taw oxygen lias hits diminished by about 8 3 per cent tho the carbonic car boule acid has increased to times tho the original quantity y such air must bo be very different in quality from tile ordinary atmosphere and it is 1 collected collect eI in 11 ajar it jai and anda a lightcap candle is ie introduced tho bo t canalo 19 1 9 and louv i niu 11 16 piatta ji when an an all |