18 INSTRUCTIONS. 



supplied with an instrument better calculated 

 to bring up substances than the lead usually 

 employed for this purpose. 



For the purpose, not only of ascertaining the 

 set of the currents in the Arctic Seas, but also 

 of affording more frequent chances of hearing 

 of your progress, we desire that you do frequently, 

 after you shall have passed the latitude of 75° 

 north, and once every day, when you shall be 

 in an ascertained current, throw overboard a 

 bottle, closely sealed, and containing a paper 

 stating the date and position at which it is 

 launched; and you will give similar orders to 

 the commander of the Trent, to be executed in 

 case of separation ; and, for this purpose, we have 

 caused each ship to be supplied with papers on 

 which is printed, in several languages, a request 

 that whoever may find it should take measures 

 for transmitting it to this office. 



And, although you are not to be drawn aside 

 from the main object of the service on which 

 you are employed, so long as you may be en- 

 abled to make any progress, yet, whenever you 

 may be impeded by ice, or find it necessary to 

 approach the coasts of the continent, or islands, 

 you are to cause views of bays, harbours, head- 

 lands, &c, to be carefully taken, to illustrate and 

 explain the track of the vessels, or such charts 



