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gest that the best Expedient would be, to find out a Wood having that quality. But certainly there being now no Timber, fit for Ships, that is not known, 'tis not likely that any will be found either more hard, or more bitter, than that, which has been hitherto employed. Some do imagine, that the Proposer will, by certain Lixiviums, give to the ordinary Wood such a quality and bitterness, as is found in the already mention'd Indian Pear-tree. But this also will hardly succeed, since it will be requisite not only to make Lixiviums, in great quantities at an easie rate, and strong enough to penetrate the thick sides of a Ship, but also to make them durable enough, not to be wash't out by the Sea. Yet not withstanding, in these matters one ought to suspend on's judgement, untill experience do shew, what is to be believed of them.
So far the Extract. To which it may perhaps not be unseasonable to add, that a very worthy person in London, suggests the Pitch, drawn out of Sea coles, for a good Remedy to scare away these noysome insects.
This Curious and Excellent Piece, is a kind of Introduction to the Principles of the Mechanical Philosphy, explicating, by very Considerable Observations and Experiments, what may be, according to such Principles, conceived of the Nature and Origine of Qualities and Forms; the knowledge whereof, either makes or supposes the Fundamental and Useful part of Natural Philosophy. In doing of which, the Author, to have his way the clearer, writes rather for the Corpuscularian Philosophers (as he is pleased to call them) in General; than any
