198 Scientific Proceedings, Royal Dublin Society. 
F. Schulze says, that snow fall is often associated in a strongly 
marked manner, with sudden increase in carbonic anhydride, and 
gives the following examples— 
Before snow-fall. After fall of— 
2°56 50 grm. snow. 2°71 
2°69 AND) Aare 2°81 
2°80 250 & 750 ,, ,, 3°37 
2:96 Oy iy 3°15 
2°77 5500 oo 3-04 
2°75 B00 45° se 3-03 
at the same time he remarks that there are exceptions to the rule. 
Spring and Roland found the average amount of carbonic 
anhydride on eight days during which snow fell to be 3°761, which 
is considerably above the average for Liége, viz. 3352, and even 
above the average for fog and mist viz., 3°571, in that town. 
Farsky’s results at Tabor, in Bohemia, similarly point to an 
increase during snowy weather, the mean amount for twenty days 
on which snow fell during the period of his observations (calcu- 
lated by us) being 3°60, while that for Tabor generally was found 
by him to be 3°48. The following figures which we have collected 
from his results are also of interest, as tending to show not only 
that an increase in carbonic anhydride occurs during snow fall, but 
that with continued snow, a further increase takes place as a rule— 
Day before snow. Snowy day. Following day. 
3°57 3°72 3°75 (snow). 
3°45 3°69 3°91 (snow). 
3°47 3°52 3°49 (snow). 
3°37 3°39 3-51 (snow) 
3°33 3°61 3°75 (snow) 
3°39 3°28 | 3°59 (bright). 
3°41 3°75 3°62 (rain). 
3°65 3°75 3°41 (fine) 
3°41 3°59 3°60 (snow) 
