SUPPLEMENTARY REPORT ON METEOROLOGY. 71 
mirable abstract and analysis of all these observations has been 
made by the last-named indefatigable observer, in a special me- 
moir on the subject*, which we could hardly abridge without 
transcribing, and will therefore state chiefly the results with 
respect to the quantities A and B mentioned above. The fol- 
lowing are the principal results in a tabular form, it being un- 
derstood that in most of these cases no correction has been ap- 
plied for the temperature of the liquid in the stem of the ther- 
mometer and between the bulb and the surface of the ground. 
or uo | 3 
Ss| ig eaene| de. oss 
an < — 
Place 5 #| 2 | Extreme | 33~ 3 g|° aS pk — Sen 
. Be|/m2| Depth |sSegs| 528 — const. ess 
35/8 Brees | Bam Ny gee 
r=] L23aa Po [-7as) 
& ga a 4 
feet. feet. days 
Zurich .......0000- 8 | 43 | 6(Fr.?) 71 1-217 — 038 5 
Edinburgh ...... 4 |2 | 8(Eng.)} 58 1-068 — 052 7 
Strasbourg ...... 1 | 3 {15 (Fr.?) 81 1:279 — -040 
4/3 1-292 — 053 
4 . Ae 
96. The following observations have been made at Edinburgh, 
under my direction, at the expense of the British Association{, 
which, as well as those at Brussels, are completely corrected for 
the temperature of the liquid in the stems :— 
Edinburgh 
In Trap Tufa.| 4 | 3 | 24(Fr.)| 55 1-141 — 057 6:8 
— Loose Sand.| 4 oa] PS ee 66 1-192 — 048 6:2 
— Sandstone..| 4 | 3 | — 96 1-080 — ‘032 4:0 
97. These latter observations show very clearly the effect of soi/ 
in determining the velocity of propagation of heat which mainly 
depends upon the value of B, from which too the conductivity for 
heat of three very different geological formations may be accu- 
rately determined, so soon as the specific heat shall be known. 
98. Observations of the same kind with the preceding have 
* Mémoire sur les Variations Diurne et Annuelle de la Température, &c., 4to, 
Bruxelles, 1837. (From the Mémoires del Académie de Bruxelles, tom. x.) 
+ These observations have now been continued for three additional years, and 
the partial results are contained in the Bulletin de l’ Acad. de Bruxelles, and 
the Annuaire de l'Observatoire. Since this report was read, I have received 
M. Quetelet’s Systematic Reduction of the Observations at Bruxelles for 1837, 
1838 and 1839. The results agree extremely well with those of previous years, 
and establish the formula of Art. 93. with remarkable precision. Jém. de 
V Acad. de Bruxelles, tom. xiii. 1840. 
t See Eighth and Ninth Reports, and Atheneum for September 1839. 
