Notes on the Storms of High South Latitudes. 143 



unless the observer can or will give the time to notice them 

 properly. 



4. The direction of propagation of these storms seems, as 

 nearly as possible, to be about E.S.E. From numbers of 

 opportunities I have had of observing them while the ship 

 was going on this course, the storms follow one another 

 much more regularly, and follow out all the necessary con- 

 ditions of the diagram, while in steering either more to the 

 northward or southward the conditions are altered, but still 

 agree with the translation of the storm along this particular 

 point. But until a number of really good sychrmous obser- 

 vations are to be obtained, this will always be more or less 

 doubtful. I have every reason for knowing that ships' logs 

 are not as accurate as to winds' direction and the weather as 

 they might be; different people writing up the same log alone 

 causing considerable errors, more especially in the velocity 

 of the wind, which is generally considerably overrated. 

 The subject has lately been taken in hand here, and we may 

 hope soon to have some valuable information, only here 

 again land influences tend considerably to alter these storms, 

 and will not tend to throw very much light on their true 

 formation over the sea. 



Art. XI. — Propulsion of Steam Vessels without 

 Machinery. 



By Captain Griffiths. 



[Read by Mk. Keknot, 13th July, 1882.] 



