124 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



limits of perpetual snow in different portions of the Cauca- 

 sus. The culture of the vine succeeds without special pro- 

 tection in winter at an altitude of 3600 feet in Colchis, while 

 on the east side of Mount Ararat, even at the height of 3000 

 feet, the vines must be protected in winter. 



Over a hundred hot springs are known in the Caucasian 

 range; and, according to Radde and Abisch,the distribution 

 of these springs is independent of the extensive volcanic 

 activity that exists in the former geological peaks. On the 

 other hand, the springs as well as the volcanic phenomena 

 are distributed in cognate methods along the dividing lines 

 of axes of elevation and dislocation. 



The most remarkable collection of mineral springs is at 

 Pjatigorsk, where within the space of twenty-five square 

 miles every possible kind of mineral sj^rings is found : sul- 

 phur springs, alkali springs, iron springs, and muriatic-acid 

 springs, all of which are abundantly visited by invalids. 

 Sitzungsh. Ostiyreuss. pliysikaliscli-bkonom. Gesells., Konigs- 

 herg, p. 8. 



THE EASTWARD PROGEESS OF STORMS. 



Robert Tennant, Esq., has endeavored to elucidate his 

 views on the causes by Avhich storms progress in an easter- 

 ly direction. According to him the barometer rarely indi- 

 cates the pressure due to the weight of the air directly 

 above it ; but owing to the sluggish currents at the surface 

 of the earth and the rapid currents above, the pressure is di- 

 minished at the surface of the earth, although it may remain 

 undiminished at higher altitudes. When in consequence of 

 high winds the barometer falls, a spiral inflow then takes 

 place toward the centre. This inflow is unequal on the 

 different sides, being for Great Britain less on the east and 

 northeast side, and greatest on the southwest side, in conse- 

 quence of which the centre of the barometric depression 

 moves eastward. As regards the truth of his statement 

 that the barometer can not give a true indication of weight 

 when the atmosphere is in motion, there can be no doubt ; 

 but the exact amount of the diminution of pressure, as cal- 

 culated by well-known formula, is probably much less than 

 that assumed by Mr. Tennant. Proceedings Boyal Society^ 

 Edmhurgh,Ylll.,Q\2. 



