252 £. Loonus— Contributions to Meteorology. 
for the given time and place was less than 6 degrees, and I 
have added various particulars which are designed to shed some 
light upon the cause of this peculiarity. Column 1st gives the 
dates of the cases; column 2d gives the station of highest 
pressure; column 3d gives the depression of the thermometer 
below its mean height at this station. Column 4th shows the 
degree of cloudiness at this station (scale 0-10); column 5th 
gives a station not very remote from the preceding where the 
thermometer was more depressed below the mean; column 6th 
shows the temperature at this station; column 7th shows how 
much the thermometer at this station was depressed below the 
mean, and column 8th gives several stations where the sky was 
entirely overcast with clouds, and at most of these stations 
there was some precipitation in the form of snow or rain. 
TasiE III.— Cases of unusually high temperature with high pressure. 
Extreme cold. 
Date. ee Below, Cloud. anes Sky entirely overcast. 
i Station. | Therm. | mean 
1878. Dec. 28|Yeniseisk.| +6 0 |Irkutsk. 299 | =10 Turuchansk, Kainsk. Irkutsk. 
1880. Jan. 24/Yeniseisk.) —4 0 |Kkaterinb.| —17 | —22 |Turuchansk, Ekaterinburg. 
1881. Mar. 23/Barnaul. =i INE bare ary Se le _... | -... |Turuchansk, Ekat. Kainsk. 
Noy. 4/Yeniseisk.|; —4 9 /|Barnaul. — 2 | —19 |Turuch., Tomsk, Akmolinsk, 
Dec. 14] Yeniseisk. 0 4 |Barnaul. —12 | —18 |Turuchansk, Akmolinsk, Hkat, 
27|Yeniseisk.| —3 10 |Barnaul. —23 | —29 |Yeniseisk, Turuchansk, Hkat. 
1882. Jan. 15)Warsaw. +3 1 |Kiew. +14 | — 9 |Dorpat, Moscow, Munich. 
Feb. 20|N. Ireland 0 SU lye lease euneee =. | .-.2 |Malencia, Plym:; Bordeauxaiaam 
1883. Nov. 15! Viatka. 0 10 ‘'Semipalat.'! + 6 § —14 'Viatka, Dorpat, Kasan. | 
We see that in these cases there was generally a station not 
very remote from the center of high pressure where the ther- 
mometer was more depressed than it was at the high center, 
which agrees with what has been found for the United States. 
We also see that in only two of the cases was the sky at the 
center of high pressure entirely free from clouds, and in each 
case there were stations not very remote where the sky was 
entirely overcast and there was some precipitation in the form 
of rain or snow. These facts seem to indicate that the com- 
paratively high temperature attending these high areas was 
due to local disturbances which gave rise to cloudiness and the 
consequent development of heat. 
In order to ascertain whether an unusually low temperature 
in Central Asia is generally attended by a barometric pressure 
considerably above the mean, I have selected all the cases in 
which the thermometer at Yeniseisk fell as low as —86° C., 
during a period of seven years (1876-1882) and opposite to 
each temperature I have placed the barometric pressure for the 
same dates. The particulars are shown in Table LY. 
