Norwich, Octob. 20th, 1758.
It is well known, that brass has been sometimes found to affect and disturb the magnetic needle; but, to give magnetism and polarity to brass, has not, that I have yet heard, been before attempted. I therefore have taken the liberty to lay the above account before this Royal Society, and have also brought the pieces of brass mentioned therein, which have been thus made magnetical.
H. Baker.
London, Nov. 15. 1759.
CVII. An Account of the Sea Polypus, by Mr. Henry Baker, F.R.S.
To the Right Honourable the Earl of Macclesfield, President of the Royal Society.
My Lord,
Read Nov. 23, 1758.
I now return the marine animal your Lordship did me the honour to recommend to my examination; which I find to be a species of one kind of the Sea Polypi, mentioned by naturalists; but I think not very accurately described.