499 A. E. Verrill—The Bermuda Islands. 87 
According to Governor Lefroy the lowest records of temperature 
are most apt to occur in March. He states that in the years 1872-77, 
a thermometer on grass registered below 40°, 17 times, viz.:—Dec- 
ember, twice; January, four times; February, three times; March, 
eight times. The lowest was 34°, in January, 1874; the lowest in 
March was 35°, in 1877. 
Table of Mean Monthly Temperatures and Rainfall. 
The following table is copied from Governor Lefroy’s work on the 
Botany of Bermuda : 
ConpDITIONS OF TEMPERATURE AND RAINFALL AFFECTING VEGETATION IN 
: BERMUDA.* 
Temperature | Temperature 
of the air. | Or He soil: | Mean 
| rainfall. 
| | Nl | Inches. 
| 9a.mM. | 3 P.M. |at 6 Ins.jat12 Ins. 
° ° | ° | ° In. 
TVEMUCTAY Sos Se Sa ae ere lm Gokona noe OMa eG 2eor a) 3.8 
HebRUakyeee sss ee scene os sek ees 63.7 65.1 @iloal 61.4 4.2 
IMU) bY, 5 esa ee a a 63.8 65.5 61.5 | 61.5 3.6 
Ajoiles Bo ee Bs So eo eee sae 67.4 69.3 64.8 | 64.9 3.3 
Wii Ramer ames Semin Se Oe Ye ele 72.0 G30 69.9 | 69.5 4.1 
UT OME MEE terse Sm oo ne che casas 76.8 78.8 Pay i) ene) 7 3.3 
Pet ivan see rey ae te ne he! 81.3 82.9 Visas || ed) 4.0 
ATER SE Ss Se Ee hee ene eee 82.5 84.2 79.1 79.2 3.9 
DeEplcember eee ea Sete ke ee 80.2 81.9 Yell 76.9 4.8 
GLH OST eS a 75.9 76.7 73.4 Wet (O27 
INOViETNO OTR ee ee oe arene Ls 69.8 Pi iboal 67.2 68.1 5.7 
Decemibenme sss sees Se 65.4 66.4 62.9 | 63.2 4.0 
Ee | peas ee De 
{ al@ 73.4 69.3 | 69.4 51.4 
The mean annual temperatures of the air during 22 years was 
71°.9 at 9 A. M., and 73°.4 at 3 P. M. 
The mean temperature of the soil at the depth of 12 inches was 
69.°4, which is probably very close to the true mean annual temper- 
ature. He gives the average annual rainfall, for the same period, as 
51.4 inches. 
* The mean temperatures are given by observations extending (with some 
lacunz) from August, 1855, to March, 1877. The temperature of the soil at 6 
inches is the mean between observations at 9 a.m. and 5 P.M., apparently the 
hours of extreme daily range. The temperature at 12 inches is that at 9 a.m.; 
the daily range at this depth is under 0°.5, and is about the mean at 9 A.M. 
