This Benjamin Franklin letter was written to Jared Eliot in 1753 and is part of a series of letters Franklin wrote to various friends about his electrical studies and observations. Several of these letters were put together in a book called "Experiments and Observations on Electricity Made at Philadelphia in America" by his friend Peter Collinson, who was a member of the Royal Society in London. This book became the most reproduced book of the eighteenth century and made Franklin famous throughout Europe and America. Many years later this fame was responsible for Franklin receiving the help of the French government on behalf of the Americans during the Revolutionary War.
In this letter, Franklin answers a question sent to him by Mr. Eliot and refers to the letter of thanks written to him and the Royal Society from the King of France. You can read the other letters in the series at our Benjamin Franklin and Electricity letters page here.
Philada. April 12. 1753
I received your Favour of March 26. and thank you for communicating to me, the very ingenious Letter from your Friend Mr. Todd, with whom, if it may be agreeable to him, I would gladly entertain a Correspondence. I shall consider his Objections till next Post.
I thank you also for the Hint concerning the Word Adhesion, which should be defin'd. When I speak of Particules of Water adhering to Particles of Air, I mean not a firm Adhesion but a loose one, like that of a Drop of Water to the End of an Icicle before freezing. The firm Adhesion is after it is frozen.
I conceive that the original constituent Particles of Water are perfectly hard, round and smooth. If so, there must be Interstices, and yet the Mass incompressible. A Box fill'd with small Shot, has many Interstices, and the Shot may be compress'd because they are not perfectly hard. If they were, the Interstices would remain the same, notwithstanding the greatest Pressure, and would admit Sand, &c. as Water admits Salt.
Our Vessel, named the Argo, is gone for the N.W. Passage; and the Capt. has borrowed my Journals of the last Voyage, except one Vol. of a broken Set, which I send you. I enclose a Letter from our Friend Mr. Collinson: and am promis'd some Speltz which I shall send per next Post.
The Tatler tells us of a Girl who was observ'd to grow suddenly proud, and none could guess the Reason, till it came to be known that she had got on a pair of new Silk Garters. Lest you should be puzzel'd to guess the Cause when you observe any thing of the kind in me, I think I will not hide my new Garters under my Petticoats, but take the Freedom to show them to you, in a Paragraph of our Friend Collinson's last Letter viz. - But I ought to mortify, and not indulge, this Vanity; I will not transcribe the Paragraph. - Yet I cannot forbear. "If any of thy Friends (says Peter) should take Notice that thy Head is held a little higher up than formerly, let them know; when the Grand Monarch of France strictly commands the Abbe Mazeas to write a Letter in the politest Terms to the Royal Society, to return the Kings Thanks and Compliments in an express Manner to Mr. Franklin of Pennsilvania, for the useful Discoveries in Electricity, and Application of the pointed Rods to prevent the terrible Effects of Thunder-storms. I say, after all this, is not some Allowance to be made if the Crest is a little elevated. There are four Letters containing very curious Experiments on thy Doctrine of Points and its Verification, which will be printed in the New Transactions. I think now I have stuck a Feather on thy Cap, I may be allowed to conclude in wishing thee long to wear it. Thine, P. Collinson." On reconsidering this Paragraph, I fear I have not so much Reason to be proud as the Girl had; for a Feather in the Cap is not so useful a Thing, or so serviceable to the Wearer, as a Pair of good Silk Garters. The Pride of Man is very differently gratify'd, and had his Majesty sent me a Marshal's Staff, I think I should scarce have been so proud of it as I am of your Esteem, and of subscribing my self with Sincerity Dear Sir, Your affectionate Friend and humble Servant
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