[ 586 ] 
could learn from him, there feemed to be no reafon 
for this fuppofition. He is long fince perfectly reco- 
vered. 
I am, Sir, 
Your mod obedient 
Mod humble fervant, 
Charlton Wollafton. 
X CVII I. Observations on the Tides in the 
IJland of St. Helena : in a Letter from the 
Rev. Nevil Mafkelyne, A. M. F. R. S. to 
Thomas Birch, D . D. Secretary to the 
Royal Society . 
Reverend Sir, 
Read Nov. 1 8, 
ij6z. 
N O T having met with any obferva- 
tions of the tides made in a place 
fo near the line as this, or at an illand fituated in the 
middle of fo large an ocean, I was defirous of mak- 
ing fome experiments on this fubject. For this pur- 
pole I had a pod about i o foot long ere&ed in a con- 
venient place in the harbour before James’s fort, 
which was the propered fituation that could be found, 
being to the leeward part of the illand, where ihips 
may ride at anchor fafely all the year round. 
One fide of it was painted black, over which white 
drokes were painted at the didance of 3 inches, 
1 which 
