Practical Deductions Sor Navigators. — 392 
circle, with the observed direction of the storm-wind, at the first 
shening or commencement of the gale. In this manner the 
geographical position and coming changes of the storm may be 
apprehended by those who may not fully comprehend the law of 
€ wind’s rotation.* 
These storm figtires and their uses, may be exemplified in the 
annexed diagrams.+ 
Fig. 6.—Storm Figure for Northern Hemisphere. 
ort 
se 
a, General Course of the Storm in the low latitudes; changing successively to 6, which 
itudes. 
is the general course in the Temperate latitud 
ing to the North, and in such location on the Chart that one of the wind arrows in the 
Suter circle will conform to the actual direction of the wind. arly t 
true position of the storm at that time. Then move forward the figure in the direction 
in which gales commonly advance in that latitude and locality, but without turning the 
* See Col. Riw’s work, first edition, pp. 5—7 and 424427. Weale, London, 
1s, Also, Horn Book of Storms, for the Indian and China Seas, by Hexry 
Pinpineron : Ostell & Lepage, Calcutta ; W. H. Allen, London, 1845. I have 
lately received from Mr. Pinpineroy his Thirteenth Memoir, which relates to the 
“9 i ne of the Charles Heddle, before mentioned, and is well worthy of the at- 
tention of both navigators and meteorologists. 
= a aegeng Bowditch’s Navigator, edition of 1839, pp. 441, 442; edition of 1845, 
$s : . > 7 ‘ 
