BULLETIN 



OF THE 



Vol. 4. Salem, Mass., April, 1872. No. 4. 



One Dollar a Year iu Ailvance. 10 Cents a Single Copy. 



Eegular Meeting, Monday, March 4th, 1872. 



[ Con tinued .] 

 STORMS. 



In observations on an approaching storm the eleva- 

 tion of 6,000 feet is important, inasmuch as the observer 

 is above the lower strata, the "storm-scucl." Here he 

 may note the changes in kind and rehitive position of the 

 several cloud strata from the moment the storm is seen 

 along the western horizon, two hundred miles distant, till 

 it shall envelop the lofty peak of Mount Washington. The 

 elevation of a storm moving east can be seen as far dis- 

 tant as NeAv York City. 



AVhen condensation advances but little faster than the 

 storm line, it is a more interesting study than wdien the 

 condensation is going on for days, and over a wide ex- 

 tent of country at the same time. If rapid and with the 

 storm, Ave notice at an immense height the "polar bands" 

 of cirrus, lower, cirro-stratus, or cirro-cumulus. From 



Essex Ixst. Bulletix. iv 6 



