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A Letter from Dublin, concerning the Porphyry Pillars in Egypt. By Dr. Huntingdon.
SIR,
YOU engage me after a very undeniable manner, as I perceive by the minutes of your Philosophical Society, to send you some account of the Porphyry Pillars in Egypt; and though I could have satisfied your Curiosity much better in this matter, had you thought of it when I was amongst my Papers in Oxford, yet rather than hazard your good Opinion, or give the least pretence of disrespect to your worthy Company, for whose Persons and Designs I have so just an esteem and veneration: I here send not what's fit for me to write, or you to read, but what I can remember upon this subject.
Nor do I intend to speak concerning the na∣ture or composition of Stones in general, or of Porphyry more particularly, but meerly as to matter of Fact, so far chiefly as it fell under my own cognizance, i. e. if you please, rather like an Historian than a Philosopher.
In the first place then, I think it may be taken for granted, that there is no such Quarry, or Rock of Stone rather, in all the lower parts of Egypt; for so far as the Nile o'erflows is perfect Soil. A Sample whereof I hope you still retain, and let me entreat you to be very exact in weighing it this year, that you may be sure