380 ANNUAL OF SCIENTIFIC DISCOVERY. 



climate is favorable to lung diseases, is during the month of September 

 and the first part of October, when the air is warm, dry and quiet. 

 s lt has been customary for northern invalids to return when benefitted. 

 In general, all who did so have been re-attacked and finally carried off 

 - sometimes very suddenly. From statistics and information which 

 Dr. Burnett has been collecting, he has come to the conclusion that con- 

 sumptive invalids to be permanently benefitted by a change of climate, 

 must go South and make their home there. The climate of Green- 

 ville, S. C.,and some parts of Georgia, is exceedingly favorable to those 

 laboring under this disease. In Summer the temperature rarely exceeds 

 90, and is free from sudden changes. Dr. Burnett is of the opinion 

 that the United States possess a variety of climate and advantages for 

 this disease far superior to those of Europe. 



ON THE APPLICATION OF THE LAWS OF STORMS TO NAVIGATION 



THE following rules and suggestions, applicable to ships which have 

 become involved in storms, were published by Capt. Andrews, R. N., 

 in the Bermuda Royal Gazette. 



By keeping the wind on the Starboard Quarter, when in a revolv- 

 ing Storm in the Northern Hemisphere, ships gradually sail from the 

 Storm's centre : and by keeping the wind on the Port Quarter, when 

 in the Southern Hemisphere, Ships sail gradually from the centre ol 

 a revolving Storm. This rule applies to three-quarters of the Storm's 

 Circle. But there is always one Quadrant in a progressive whirl- 

 wind Storm, more dangerous than the other three, being that over 

 which the Storm's centre passes in its progress ; and there would be 

 danger in applying the rule with a Ship in this Quadrant. With- 

 in the Tropics whilst the course of Storms tends towards the 

 West, the quadrant of greatest danger will be on the west sides. But 

 these quadrants will gradually change their position as the Storms re- 

 curve ; and in high Latitudes, as the course of the Storms becomes 

 Easterly so will these Quadrants of greatest danger come to be on the 

 East side of the Storm. In order to know which is the Quadrant of 

 greatest danger, the theory must be studied until it is understood. 



An example of Capt. Andrews's rule for the Southern Hemisphere 

 was practiced by Captain Moorsom, when commanding the Andromache 

 Frigate, at Mauritius, in 1826, and is the more remarkable because 

 it was executed by Captain Moorsom, before the theory of Storms was 

 understood. Leaving H. M. S. Ariadne, in Port Louis Harbor, at the 

 wish of her Commander, Captain Moorsom put to sea in the Androm- 

 ache with the wind at S. E., veering to S. S. E., predetermined to 

 steer without regard to the compass, and to keep the wind as it veered, 

 always upon the larboard or port Quarter. He had come to this 

 decision from attentively studying the Logbooks, of Ships which had 

 encountered Hurricanes, in the neighborhood of Mauritius, and ob- 

 served that the wind veered there in a uniform manner. By steering 

 as described, Captain Moorsom gradually carried his Frigate away 

 from the centre of the storm, until he had gained its opposite side, 



