On three several hurricanes of the Atlantic, and their relations to the northers of Mexico and Central America, with notices of other storms . ccompanied with remarks on lyingto, and by him and Mr. Piddington have been placed on cards,and on plates of horn or glass, in order that a mariner may deter-mine the place of a vessel in a storm, by placing the figure onthe face of his chart, in such manner as to coincide, on the outer * See, also, Col. Reids valuable Note on Progressive Revolving Winds and theAdvantages of Sailing on Curved Courses; Jamesons Ed. New Phil. Journal forJuly, 1846. Also,
On three several hurricanes of the Atlantic, and their relations to the northers of Mexico and Central America, with notices of other storms . ccompanied with remarks on lyingto, and by him and Mr. Piddington have been placed on cards,and on plates of horn or glass, in order that a mariner may deter-mine the place of a vessel in a storm, by placing the figure onthe face of his chart, in such manner as to coincide, on the outer * See, also, Col. Reids valuable Note on Progressive Revolving Winds and theAdvantages of Sailing on Curved Courses; Jamesons Ed. New Phil. Journal forJuly, 1846. Also, Remarks on Lying to, in the Messrs. Blunts forthcoming edi-tion of the Young Seamans Sheet Anchor. Practical Deductions for Navigators. 117 circle, with the observed direction of the storm-wind, at the firstfreshening or commencement of the gale. In this manner thegeographical position and coming changes of the storm may beapprehended by those who may not fully comprehend the law ofthe winds rotation.* These storm figures and their uses, may be exemplified in theannexed diagrams, f Fig. 6.—Storm Figure for Northern Hemisphere. North,.. £ B a, General Course of the Storm in the low latitudes; changing successively to b, whichis the general course in the Temperate latitudes. Directions.—First, mark the position of the ship on the Chart, at the beginning of agale, and then place this figure to the southward of such position, with the needle point-ing to the North, and in such location on the Chart that one of the wind arrows in theouter circle will conform to the actual direction of the wind. This will show nearly thetrue position of the storm at that time. Then move forward the figure in the directionin which gales commonly advance in that latitude and locality, but without turning thefigure. The arrows which are thus brought in succession over the ships place, will showthe changes of wind which may be expected, in the further progress of the gale; andalso, into what portion
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Keywords: ., bookcentury1800, bookdecade1840, bookid60721150rnlm, bookyear1846
