i94 Scientific Intelligence. — Zoology. 



morning on the part recently burned, and no degree of pain in- 

 duces the patient animal to refuse or throw it off. If it once 

 sinks, however, overpowered, either by hunger or toil, it cannot 

 be compelled to rise again* 



GEOLOGY. 



2. Subterranean Temperature. — As you lately, in conversa- 

 tion, expressed a wish to obtain some details regarding the ex- 

 periments upon subterranean temperature, which have been 

 carried on for some time back in some of the Freyberg mines, 

 under the direction of M. Reich, professor of physics in the 

 Mining Academy, I send you a few of the facts which I was 

 able to collect during my late visit to that highly interesting 

 district. — The mine to which my observations were confined, 

 and in which the most complete series of experiments are going 

 on, is the JTurprinz, distant about five miles south-west from 

 Freyberg. It is one of the three largest in the district. There 

 are four thermometers in this mine, in the Treibschacht, third, 

 fifth and eighth galleries; of the results of whose indications 

 the following is a synoptic Table, for the twelve months which 

 preceded the date of my visit on the 19th October 1830. They 

 are observed three times a-week, on Monday, Wednesday, and 

 Friday, either at 7 a. m. or 12 noon ; and every observation 

 is made and registered on the spot by Steiger Richter, the cap- 

 tain of the mine. 



stations. 



Treibschacht, 



3d, Gezeugstrecke, 



5th, Do 



8th, Do 



Perpendicu- 

 lar depth in 

 Leipzig feet 



18 



490 



634 



1300 



liOwest 

 tempera- 

 ture. 



43«.92 F. 

 57.94 

 62.42 

 67.44 



Highest 

 tempera- 

 ture. 



590.67 F 

 61 .18 

 62.64 

 68.45 



5 10.79 F 

 69.56 

 62.53 

 67.94 



Range. 



150.75 F. 

 3.24 

 0.22 

 1.01 



During my visit to the mine, I observed two of the thermo- 

 meters, that in the Treibschacht and third gallery. The tem- 

 perature of the first was 59°. 79 Fahr. ; air of gallery being 64° ; 

 — ^that of the latter was 62°. 49; air of gallery 62°. — In the 

 fifth gezeugstrecke, at a depth of 634 feet, is a chalybeate 

 spring, nearly pure, strongly impregnated with a large volume 



