398 J^'UEyAL 01 THE EOYAL HOEnCULTUEAL SOCIETY. 
Mean reiaiive ii<miidiiy of the air at 9 ajn. r complete saturation being repre- 
sented by lOOf 88 
Bain fell on 11 days to the total depth of 1-22 in. 
(EquiTalent to 6 gallons on each square yard of sozface in the Gardens.) 
Heaviest fall on any day ... ... ... ... ... ... (h27 in. on the Is 
On the 12th the ground was eoTered with snow to the average depth of ... 1 in^ 
TJie Diagrams. — The averages with which the different mean monthljr 
temperatures are compared in diagrams 1 and 2 are derived from the obser- 
vations taken at Kew Observatory during the twenty-five years ending- 
DIAGRAM 1 
~ e c 
- o. o 
- 
- 3. 0 
- 
- 'Z'.o/ 
- 7. 
- 7 Oj 
oo 
-JO 
-J.o 
i -'2 0 
.V 
V 
— '^.o 
— 3. 0 
- V 
^ 7.0 
- / o 
+ /;- 
- / :? 
- // s 
- o.^ 
-oj. 
-OS 
-J.Z 
— 7. 
-J. 6 
— 
-'ZO 
— J?.^ 
1830. I _ T ... ::J averages for Kew have not been used, but the departures 
in mean temperature, &c., from the monthly means for 1899 at that Obser- 
vatory have ^ to the Ghiswick temperatures ; and in this way 
very close . ns to the true monthly averages have been 
obtained. Mr. Glaisher s discussion of the Chiswiek temperatures 
(1826-1869 J be: v ' —. not available for this purpose, as it 
gives no maxitL res. The rainfall averages used in 
diagram 1 are. L .vcVti. liio^c giVcn by Mr. Glaisher for the forty-four 
year? en^inr 1*"'"^ 
1 a glance the general 
character of T-ci^aici oi each &i iiuis under discussion, as 
