Scientific Intelligencc.^-^Meteorology. 187 



in Europe is about 13° Fahr. 7. At Padua the daily me- 

 dium is at 8 hours 41 minutes a. m., and 7 hours 52 minutes 

 p. M. ; at Leith at 9 hours 13 minutes a. m., and 8 hours 27 

 minutes p. m. 8. The greatest daily range of temperature in 

 Europe takes place in July, and the least in December.— A^r^w. 



4. Compariswi of Winds, and the different heigfUs of the 

 Sea at Copenhagen. — 1. The N., N.W., W. and S.W., gives 

 high-water in the Sound, but S., S.E. and N.E. low- water ; 

 N.W. the highest, E. the lowest medium level. 2. The oscil- 

 lations in the height of the sea depend principally on the winds. 



5. Comparison of Wijids with the Cicrrents in the Sea near 

 to Copenhagen. — 1. The southerly current is most frequent du- 

 ring the south wind, the northern during the north wind, &c. 

 2. The principal cause of the currents in the Sound is the wind. 

 '-'Schow. 



6. Temperature of common Perennial Springs. — It is a gene- 

 ral opinion, that these springs derive their temperature from the 

 strata they traverse, which strata, it is maintained, obtain other 

 heat directly by transmission from the atmosphere. It is much 

 more probable, that such springs derive their temperature chiefly 

 from the percolating atmospheric water. The experiments made 

 at Raith in Fifeshire, do not prove any thing in favour of the 

 first opinion, and are opposed to the latter. The heat of the 

 soil, and superficial strata in the north, and the comparative low 

 temperature of springs from the south of Europe to the tropic 

 of Cancer, are to be traced to the percolating water. 



7. Account of a Hurricane.— -'When the ships were ready to 

 depart, a terrible storm swept the island. It was one of those 

 awful whirlwinds which occasionally rage within the tropics, and 

 which were called by the Indians furicans or uricans, a name 

 which they still retain with trifling variation. About mid-day 

 a furious wind sprang up from the east, driving before it dense 

 volumes of cloud and vapour. Encountering another tempest 

 of wind from the west, it appeared as if a violent conflict en- 

 sued. The clouds were rent by incessant flashes, or rather 

 streams of lightning. At one time they were piled up high in 

 the sky ; at another they descended to the eai'th, filling the air 

 with a baleful darkness, more impenetrable than the obscurity of 

 midnight. Wherever the whirlwind passed, whole tracts of fo- 



