180 • 
With regard to these tables, it must be remembered that 
the success or want of it is only by comparison with previous 
years, nor does it necessarily mean that there has been even a 
moderate attachment, but only that one year was better than 
another. 
By combining the 1st and 2d classes and 3d and 4th on each 
bed, and combining such beds as are similarly situated and 
contiguous, I have arranged the following table for compari- 
son with the similar one of the dredging results on the beds 
in the Bay: 
