46 POPULAR LECTURES AND ADDRESSES. 



reference, that the line is to be faked in the 

 hand, not coiled ; that the log-ship is to be thrown 

 out well to leeward to clear the eddies near the 

 wake, and in such a manner that it may enter the 

 water perpendicularly, and not fall flat upon it ; 

 and that before a heavy sea the line should be paid 

 out rapidly when the stern is rising, not when the 

 stern is falling ; as this motion slacks the line, the 

 reel should be retarded. 



32. " Massey's Log. This instrument shows the 

 distance actually gone by the ship through the 

 water, by means of the revolutions of a fly, towed 

 astern, which are registered on a dial plate. 

 This log is highly approved in practice ; and 

 it is much to be desired that the patentee could 

 manufacture, at a moderate price, an instrument 

 which affords a method, at once so simple and 

 so accurate, of measuring a ship's way, and 

 which could not fail to come into extensive, if 

 not genera 1 , use. 



33. " The Ground Log. When the water is 

 shoal, and the set of the tides or current much 

 affected by the irregularity of the channel, or 



