Lerts & Bhake—The Carbonic Anhydride of the Atmosphere. 201 
of carbonic anhydride when the air is analysed at a station removed 
from local influences. As to the effects of force, they considered it 
an unimportant factor under ordinary conditions, but from the 
table which they give distinct diminution appears to be the rule 
with high winds from all directions except N., 8.W., W.N.W., and 
possibly W., but the average diminution for all high winds is not 
large. 
v. Fodor, at Buda-Pesth, gives the following figures for 1877- 
1879 :— 
(<‘ Passat ’’), (‘‘ Anti-passat’’) 
N., N.E., E bp Sa \ifon Mie 
COz in 10,000 air mean, : - 3°76 : : 5 SOO 
4 op pn WAU, . 38°84 F ‘ . $94 
5 9» 9) Summer, . . 3°69 : : 5 BSH 
Yearly Mean. Be Windy 
ays. 
COz in 10,000 air, . 1877-1878 5 ORS = 5g BRON 
Se nea 5 1879 5 BFS 5 6 GRE 
Mention may also be made of the view held by Marié-Davy, 
that the oscillations in the amount of atmospheric carbonic 
anhydride depend upon the changes in direction of the great 
aerial currents, and that the former may be employed in weather 
forecasting—a view which we believe to be incorrect. 
As regards the theoretical aspect of the question of the in- 
fluence of winds, it seems almost useless to discuss it without 
taking into consideration other meteorological factors, such as the 
type of weather prevalent and the movements of the barometer and 
thermometer. 
The anti-cyclonic type of weather is characterised by calms, 
high pressure, and radiation, the general movement of the atmo- 
sphere being descensional. ‘The probable effects of such a system 
on the amount of atmospheric carbonic anhydride are somewhat 
difficult to forecast. ‘Ihe cold at night, coupled with high pressure, 
should lead to a régime of minima. During the day, however, 
solar radiation and calm might have an important influence in 
reversing this effect on land surfaces, the imprisoned gases of the 
soil escaping as the ground becomes heated by the sun’s rays and 
rising. This movement would, however, be checked by the 
descenscional air current, especially towards evening, and a fog or 
mist}result. Fogs and mists are, as is well known, prevalent in 
