1. 



Sect. III.] 



HYDROGRAPnY 



95 



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anchorage within. 



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the entrance with 



regard to the offing stream and prevailing M-ind, the width 

 of the channel, the protection of the anchorage, the 

 numher of square acres enclosed. If there be any back- 

 water, state its extent, how the scouring, if any, is 

 managed, at what time of tide and what is its apparent 

 efFect — and at all places wherever backwater is used, it 

 mav be as well to sound off the mouth of the port to as 

 great a distance as the effect of the scouring action can 

 possibly extend— for occasionally injurious effects liave 

 been produced by this powerful agent at a distance 

 scarcely contemplated. State all deposits, siltings up, 

 and at what rate it proceeds. 



Foreign Ports. 



35. In visiting foreign ports, a particular account should 

 be given of the resources of the place in the event of 

 vessels requiring either a repair or a refit. Such as 

 whether there are any docks, wet or dry? what sized 

 vessels they are capable of receiving, and how many at a 



time, is there a patent shp or gridiron, &c. 



How near 



vessels, of particular dimensions, can approach the wharfs, 

 or at what time of tide lie alongside of them ; whether 

 there are sheers for removing masts, and of what size, or 

 cranes for lifting machinery and boilers ; whether there 

 be a dockyard or arsenal, or whether stores can be pro- 

 cured from other sources. Whether there is a steam- 

 yard, and to what extent they cast and manufacture 



9 



machinery or boilers, or can repair steamers r 



Whether there is a coal depot, and what quantity of 



..ft^ 



