PROVISIONAL REPORTS, AND NOTICES. 435 
thermometers sunk to depths of 3, 6, 12 and 24 French feet into 
trap rock, pure loose sand, and sandstone. The details. for 
the years 1837 and 1838 were laid before the British Asso- 
ciation at Birmingham. Combining with these the observations 
for 1839, Professor Forbes exhibited the curves derived from 
the three years’ observations, and gave, in a tabular form, the 
results for the three years, as follows: 
Values of A (one of the constants in the formula used in con- 
necting the results*). 
In trap. In sand. In sandstone. 
For 1837 ...... 1°164 ..00. = EARN’ ssisan' L076 
LeaO raters Lie eesere bel tc ween LPL 
1889) -senc.¢ POBG. caccasi 12182 a..4.0 F040 
Values of B (the other constant). 
In trap. In sand. In sandstone. 
For 1837 eoecee —'0545 eoccce —*0440 eoscce —°0316 
1838 ...... —‘O641 ...... —*O0517 ...... —°0345 
1839 ...... —"0516 ...... —‘0498 ..... . —°0305 
Variation reduced to 0°01 Centigrade. 
In trap. In sand. In sandstone. 
For 1837 ...... 58°1 feet . 72°2 feet . 97°3 feet. 
1838 ..ccee 49°3 wees GIS ses. QI 
BSG atten DOS: vovses OO7 OD acess OO 
Velocity of propagation for one foot of depth. 
In trap. In sand. In sandstone. 
In 1837 ...... 7-5days. 71 days. 4°9 days. 
1838 ..ocee GB cscves GB ceovee 3°6 
1839 seevce 78 secece 2 ee ee6 46 
Report on the Action of Osler’s Anemometer at Edinburgh. 
I BEG to report, that Mr. Osler’s Anemometer has been erected 
at Edinburgh, according to the desire expressed by the British 
Association at Birmingham, and that the members of the Astro- 
* The formula in the notation of M. Quetelet is 
Log. A, = A + Bp 
Where Ap» represents the Annual Range in centigrade degrees at a depth p in 
French feet. A is the logarithm of the Superficial Range, and B is a constant 
# the soil. The values of A and B are deduced from the Annual Ranges 
alone. 
determining the propagation downwards, and proportional to 
DR os 
