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in mod Cafes feveral Obfervations were made pretty- 
near together, of which I took a Medium, making 
Allowances according to the Circumftances attending 
each: And perhaps they are as exaftas can be well 
expefted from Sea-Journals. And there can be no 
fenfible Error as to Longitudes, our Reckoning, when 
we made the Land, happening to fall out to a more 
than ufual Exafdnef?. I (hall take another Opportu- 
nity to communicate fome Magnetical Obfervations 
made with great Care at Jamaica. 
To this I (hall add the Defcrhtion of a IVater- 
Spout, which we faw about Sun-fer, May lift, 1731, 
in the Latitude 31° 30'N. and Longitude 9 0 Eafteriy 
from the Meridian of Cape Florida. Vide Tab. 
Fig. z. 
When firft we faw the Spout, it was whole and 
entire, and much of the Shape and Proportion of a 
Speaking-Trumpet (as expreffed by the Figure an- 
nexed) the fmall End being downwards, and reach- 
ing to the Sea, and the big End terminated in a black 
thick Cloud. The Spout itfelf was alfo very black, 
and the more fo the higher up. It feemed to be exa£Uy 
Perpendicular to the Horizon, and its Sides perfectly 
Smooth, without the leaft Ruggednefs. Where it 
fell the Spray of the Sea rofe to a confiderable Height, 
which made fomewhat of the Appearance of a great 
Smoak. 
From the firft time we faw it, it continued whole 
about a Minute, and 'till it was quite diffipated about 
three Minutes. It began to wafte from below, and 
fo gradually up, whilft the upper Part remained en- 
tire, without any vifible Alteration, 'till at laft it 
ended in the black Cloud above. Upon which there 
feemed 
