AN
 
ESSAY
 
TO SHEW THE
 
CAUSE
 
OF
 
ELECTRICITY;
 
AND
 
Why Some Things are Non-Electricable.
In which is also Consider’d
Its Influence in the Blasts on Human Bodies,in the Blights on Trees, in the Damps inMines; and as it may affect the SensitivePlant, &c.
In a Letter
To Mr. William Watson, F.R.S.
By John Freke, Surgeon to St. Bartholomew’s
Hospital, London, F.R.S.
Naturam expellas furcâ, tamen usque recurret.
The Second Edition: With an APPENDIX.
LONDON:
Printed for W. Innys, in Pater-noster Row.
MDCCXLVI.
[Price One Shilling.]
TO
 
MARTIN FOLKES, Esq;
 
PRESIDENT
 
OF THE
 
ROYAL SOCIETY.
SIR,
Those who have theHonour of your Acquaintance,and thenceknow your many excellentQualifications, must applaudmy Choice in dedicatingthis small Piece toyou; whose Name, if therebe any Merit in the Performance,will, before anyother, add a Lustre to it.I am, with the highestEsteem,
Your most Obliged,
Humble Servant,
John Freke.
The PREFACE.
When I first enter’d on this Subjectof Electricity, I intendedonly to put some Thoughts in Writingconcerning it, that I might the moreeasily convey them to the Understandingsof such as I hoped would be morelikely than I should be to go fartherwith it. And as nobody, either hereor abroad, had published any thingtouching the Cause from which it wasproduc’d, I chose to shew the BeginningI had made to some Friends, whoseOpinion concerning Natural KnowlegeI had a great Reliance on. I toldthem, I thought my Difficulty wouldbe to convey what I had to propound onthis new Subject to them with the necessaryClearness, as my Intention wasto observe the utmost Brevity in it.
After I had read it to them, theyassured me that what I had writtenwas perfectly intelligible; and that itgave them many new Ideas respectingthis Phænomenon; and were veryearnest with me to print it, for the sakeof the Publick.
I was not, however, inclined to complywith their Requests, till I hadshewn it to a Person who is most justlydistinguish’d for his great Candor, andsuperlative Understanding in all NaturalKnowlege; and he likewise havingexpress’d his Wishes to see it in Print,I could not but look on his Desire as aCommand.
If what I have here undertaken toshew should enlighten the Minds ofany of my Readers, or if it should so                        
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