1839] 



to develop the Jaw of Storms. 



37d 



** cet evenement a la maniere dont il etait construit ; mais, ce qui est 

 peine croyable, cet immen.^e aniere-corps de34pieds etsurmonte d'un 



*' comble en chavpente, lie en outre avec I'avant-corps qui forme la 



" fiH^ade, a cependant chasse de pres de cinq pieds sur son soubassement. 



** Quelle force prodlgieuse que celle qui a pu produire, le deplacement 

 horizontal d'une telle masse! son renversement eut ete un plieno- 

 mene ordinaire | sa translation, si Ton peut employer ce terme, ne se 

 con9oit pas."* 



In the concluding chapter, we find as follows. 



It is a well known fact, that some parts of the globe are more subject 

 ** to storms than others; and I have throughout this investigation felt 



impressed with the opinion, that the force and irequency of storms 



may have some connexion with the law of magnetic intensity. 



*' The islands of Mauritius and St, Helena are nearly in the same de= 

 ** gree of south latitude; yet at St. Helena a gale was scarcely ever 

 " known, and it is said to be entirely free from actual storms. Those 



who study Major Sabine's report on the magnetic intensities of the 

 ** globe, and follow his isodynamie lines which express unity, will find 

 *' them opening from each other in the northern part of the south Atlan- 

 *' tic, and including a space which thus really appears to be the true 

 *' Pacific Ocean of the world. Within this space, on Major^Sabine's 

 " charts, will be found two other lines, marking intensities in decimal 

 " parts less than unity; and he states that the intensity at St. Helena 

 ** as observed by Captain Fitz Roy, is 0, 84: the lowest denomination 



recorded, and the locality of the weakest intensity yet observed on the 

 " globe. 



*' When w^e examine the lines of the greatest intensity, we find them 

 " < approaching each other in longitude 110° and 260°' (100° W.), but 

 in different latitudes ; for the line of least intensity does not coincide 

 with the earth's equator. In the Chinese sea, in longitude 110° E., 

 it is to the north of the equator,proceeding thence in a direction south- 

 ward of St. Helena. 



** Of the supposed four magnetic poles, the positions of the two in the 



northern hemisphere are the best ascertained. The meridians which 

 *' run through these two poles, run also through the Chinese sea and 



near the Caribbean sea, the localities of typhoons and hurricanes ; and 

 " Major Sabine's isodynamie lines indicate the magnetic intensities so 

 *' strongly marked there, that we are led to the belief that there must be 



some connexion between the magnetic intensity and the force of 

 ** storm."t 



* Re ID, p. 141, Jlid. p. 415, 



