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In Num. 9. of these Transactions were publish'd the schemes and descriptions of certain ways of sounding the depth of the sea without a line; and of fetching up water from the bottom of it; together with some experiments already made with the former of these two contrivances. The author of the French Journal des Scavans found good, to insert them both in his Journal of May 3. but in another of May 24. intimates, that the said schemes and their descriptions are not very clear and intelligible (he means, that they were not well understood by French readers) proposing also some difficulties, relating to that subject, and esteemed by him necessary to be satisfied, before any use could be made of the said Instruments.

Some considerations touching a letter in the Journal des Scavans of May 24. 1666