1From Benjamin Franklin to Peter Collinson, 28 March 1747 (Franklin Papers)
MS not found; reprinted from extract in Benjamin Franklin, Experiments and Observations on Electricity (London, 1769), pp. 1–2. This is the earliest surviving letter in which Franklin alludes to his electrical investigations. It introduced the fourth edition of his Experiments and Observations in 1769. That edition, its predecessors and its successor, will be discussed below, under their...
2From Benjamin Franklin to Peter Collinson, 25 May 1747 (Franklin Papers)
Copy: American Academy of Arts and Sciences In my last I informed you that In pursuing our Electrical Enquiries, we had observ’d some particular Phaenomena, which we lookt upon to be new, and of which I promised to give you some Account; tho’ I apprehended they might possibly not be new to you, as so many Hands are daily employed in Electrical Experiments on your Side the Water, some or other...
3From Benjamin Franklin to Peter Collinson, 28 July 1747 (Franklin Papers)
Copy: American Academy of Arts and Sciences The inclosed is a Copy of my last, which went by the Governour’s Vessel: since which we have received, by Mesnard and Ouchterlony, Hill’s Theophrastus, Pemberton’s Dispensatory, Wilson’s Electricity and some other Pamphlets. The Proprietor’s handsome Present of a complete Electrical Apparatus &c. is also come to Hand in good Order, and is put up in...
4From Benjamin Franklin to Peter Collinson, 14 August 1747 (Franklin Papers)
ALS : Pierpont Morgan Library I have lately written two long Letters to you on the Subject of Electricity, one by the Governor’s Vessel, the other per Mesnard. On some further Experiments since, I have observ’d a Phenomenon or two that I cannot at present account for on the Principles laid down in those Letters, and am therefore become a little diffident of my Hypothesis, and asham’d that I...
5From Benjamin Franklin to Peter Collinson, 18 October 1748 (Franklin Papers)
ALS : Pierpont Morgan Library I have receiv’d your several Favours of April 1. June 2. June 14 and Augt. 20, and some others, with all the Books and Pamphlets you have sent at sundry Times for the Library Company: We wish it were in our Power to do you or any Friend of yours some Service in Return for your long-continued Kindness to us. I am pleas’d to hear that my Electrical Experiments were...
6From Benjamin Franklin to Peter Collinson, 29 April 1749 (Franklin Papers)
Copy: American Academy of Arts and Sciences I now send you some Further Experiments and Observations in Electricity made in Philadelphia 1748. viz. §1. There will be the same Explosion and Shock if the electrified, Phial is held in one Hand by the Hook, and the Coating touched by the other; as when held by the Coating and touched at the Hook. §2. To take the charged Phial safely by the Hook,...
7From Benjamin Franklin to Peter Collinson, [2 March 1750] (Franklin Papers)
MS not found; reprinted from The Gentleman’s Magazine , XX (1750), 208. I was very much pleased with some ingenious papers in the late Transactions on the subject of electricity. There is something however in the experiments of points, sending off, or drawing on, the electrical fire, which has not been fully explained, and which I intend to supply in my next. For the doctrine of points is very...
8From Benjamin Franklin to Peter Collinson, 27 July 1750 (Franklin Papers)
Copy: American Academy of Arts and Sciences Mr. Watson I believe wrote his Observations on my last Paper in Haste; without having first well considered the Experiments related in §17 *Of the third Letter. which still appear to me decisive in the Question; Whether the Accumulation of Electrical Fire be in the Electrified Glass, or in the Non-electric Matter connected with the Glass? and to...
9From Benjamin Franklin to Peter Collinson, 29 July 1750 (Franklin Papers)
Copy: American Academy of Arts and Sciences As you first put us on Electrical Experiments by sending to our Library-Company a Tube with Directions how to use it; and as our honourable Proprietor enabled us to carry those Experiments to a greater Height, by his generous Present of a complete Electrical Apparatus; ’Tis fit that both should know from Time to Time what Progress we make. It was in...
10From Benjamin Franklin to Peter Collinson, 4 February 1751 (Franklin Papers)
ALS : The Royal Society I receiv’d yours of Oct. 4. via New England, with the Account of what you have laid out on Books and Mathematical Instruments for the Academy, by which I perceive there is but about £20 in your Hands, much too little, I fear, for the Philosophical Apparatus! and the Misfortune is, that our other Expences in purchasing, Building, &c. are like to pinch us so in the...
11From Benjamin Franklin to Peter Collinson, 21 May 1751 (Franklin Papers)
ALS : Pierpont Morgan Library Budden is arrived, and every thing you sent per him come safe to hand. Both the Library-Company and the Academy are exceedingly oblig’d to you, and would be glad of any Opportunity of serving you or any of your Friends. The Academy goes on as one could wish: We have excellent Masters, and the Boys improve surprizingly: The Number now 70 and daily encreasing. I...
12From Benjamin Franklin to Peter Collinson, 29 June 1751 (Franklin Papers)
Copy: The Royal Society In Capt. Waddels Account *Ph. Tr. No. 492. p. III . of the Effects of Lightning on his Ship, I could not but take Notice of the large Comazants (as he Calls them,) that settled on the Spintles at the Topmast-Heads, and burnt like very large Torches before the Stroke. According to my Opinion, the Electrical Fire was then drawing off, as by Points , from the Cloud, the...
13From Benjamin Franklin to Peter Collinson, 1752 (Franklin Papers)
Printed in Benjamin Franklin, Experiments and Observations on Electricity (London, 1769), pp. 350–4; also draft (fragment): American Philosophical Society. The earliest surviving reference to Franklin’s magic squares and circles is in a letter from James Logan, January 12, 1750 (see above, III , 458), asking him to bring copies of his work to Stenton. Actually, Franklin had first contrived...
14From Benjamin Franklin to Peter Collinson, 1752 (Franklin Papers)
I. MS not found; printed in Benjamin Franklin, Experiments and Observations on Electricity (London, 1769), pp. 354–6. II. MS not found; facsimile: Royal Society; also draft: American Philosophical Society. Of Franklin’s magic square James Ferguson wrote that it went “far beyond any thing of the kind I ever saw before; and the magic circle (which is the first of the kind I ever heard of, or...
15From Benjamin Franklin to Peter Collinson, [October 1752] (Franklin Papers)
Printed in Benjamin Franklin, Supplemental Experiments and Observations on Electricity, Part II . … (London, 1753), pp. 108–[9]. (Yale University Library) As you tell me our friend Cave is about to add some later experiments to my pamphlet, with the Errata , I send a coppy of a letter from Dr. Colden which may help to fill a few pages; also my kite experiment in the Pennsylvania Gazette: to...
16From Benjamin Franklin to Peter Collinson, 1753 (Franklin Papers)
Transcript: Historical Society of Pennsylvania With regard to the Germans, I think Methods of great tenderness should be used, and nothing that looks like a hardship be imposed. Their fondness for their own Language and Manners is natural: It is not a Crime. When People are induced to settle a new Country by a promise of Privileges, that Promise should be bonâ fide performed, and the...
17From Benjamin Franklin to Peter Collinson, 9 May 1753 (Franklin Papers)
Copy: New York Public Library; also copies: Public Record Office, American Philosophical Society, and (part only) British Museum Although this is one of Franklin’s most important letters, there has been difficulty about both its date and its recipient. Moreover, it has never been printed accurately, nor can it be here, for no Franklin autograph has been found. The two fullest surviving...
18From Benjamin Franklin to Peter Collinson, 26 June 1753 (Franklin Papers)
ALS : Huntington Library I received a Letter from you on the Road hither, with one of the supplemental Papers on Electricity; and a Letter from our Friend Kalm. I condole with you sincerely on the Death of good Mrs. Collinson: I do not, however, offer to comfort you by Arguments drawn from Philosophy or Religion; such will readily occur to a Person of your Understanding and Piety. Natural...
19From Benjamin Franklin to Peter Collinson, September 1753 (Franklin Papers)
Copy: Massachusetts Historical Society In my former Paper on this Subject, wrote first in 1747, enlarged and sent to England in 1749, I considered the Sea as the grand source of Lightning, imagining its luminous Appearance to be owing to Electric Fire, produced by Friction between the Particles of Water and those of Salt. Living far from the Sea I had then no opportunity of making Experiments...
20From Benjamin Franklin to Peter Collinson, 23 November 1753 (Franklin Papers)
MS not found; reprinted from Benjamin Franklin, Experiments and Observations on Electricity (London, 1769), p. 165. In my last, via Virginia, I promised to send you per next ship, a small philosophical pacquet: But now having got the materials (old letters and rough drafts) before me, I fear you will find it a great one. Nevertheless, as I am like to have a few days leisure before this ship...
21From Benjamin Franklin to Peter Collinson, 18 April 1754 (Franklin Papers)
Copy: New-York Historical Society Since September last, having been abroad on two long Journeys, and otherwise much engag’d, I have made but few Observations on the positive and negative State of Electricity in the Clouds. But Mr. Kinnersley kept his Rod and Bells in good Order, and has made many. Once this Winter the Bells rang a long time during a fall of Snow, tho’ no Thunder was heard nor...
22From Benjamin Franklin to Peter Collinson, 28 May 1754 (Franklin Papers)
Copy: American Philosophical Society I had at length the pleasure of hearing from you per the Myrtilla that brought me yours of the 26th. Janry. with which I received the two Cases containing the Maps, Silk &c. all very agreeable: but nothing more so than the good News you tell me, that our Proprietor is solicitous for the Prosperity of the Academy, has ordered a Salary towards the Support of...
23From Benjamin Franklin to Peter Collinson, 29 July 1754 (Franklin Papers)
ALS : American Philosophical Society I am just return’d from Albany, where were Commissioners from seven Provinces to treat with the Indians of the Six Nations. I suppose the Treaty will be printed, and I shall send you a Copy. At present can only mention, that we brighten’d the Chain with them &c. and parted good Friends; but in my Opinion no Assistance is to be expected from them in any...
24From Benjamin Franklin to Peter Collinson, 29 December 1754 (Franklin Papers)
ALS : Pierpont Morgan Library I wrote a few Lines by a Vessel that went from hence about 2 Weeks since, acknowledging the Receipt of your several Favours of July 30. Augt. 6, and 23. and Sept. 18. Sundry Affairs have retarded my Return home, but tomorrow I purpose to set out. I am much oblig’d to you for the favourable Light you put me in, to our Proprietor, as mention’d in yours of July 30. I...
25From Benjamin Franklin to Peter Collinson, 26 June 1755 (Franklin Papers)
ALS : Pierpont Morgan Library Mr. Bartram brings a Box to my House, which has a little Vacancy in it; so I put in my Philosophical Pacquet, which I long since intended to send you, but one thing or other has prevented. I would not have any Part of it printed, (unless you should think that printing the Papers relating to Whirlwinds and Water Spouts, together with a Collection of all the...
26From Benjamin Franklin to Peter Collinson, 25 August 1755 (Franklin Papers)
MS not found; reprinted from Benjamin Franklin, Experiments and Observations on Electricity (London, 1769), pp. 356–9. As you have my former papers on Whirlwinds, &c. I now send you an account of one which I had lately an opportunity of seeing and examining myself. Being in Maryland, riding with Col. Tasker, and some other gentlemen to his country-seat, where I and my son were entertained by...
27From Benjamin Franklin to Peter Collinson, 27 August 1755 (Franklin Papers)
ALS : Pierpont Morgan Library I received your Favours of May 28 and June 1. I believe I have already wrote you, that our Friend Smith is not thought here to be the Author of the Pamphlet you mention: ’Tis generally suppos’d to be the Governor’s (with some help from one or two others) as his Messages are fill’d with the same Sentiments and almost the same Expressions. He is, I think, the...
28From Benjamin Franklin to Peter Collinson, 25 October 1755 (Franklin Papers)
Draft: American Philosophical Society The above is a Copy of my last. I hope you have receiv’d a Bill for £75 Sterling. I sent you the 1st per in mine of the 27th of August last, when I wrote for one of Mr. Smeaton’s New Air Pumps for the Academy. I now send another Bill for £30 Sterling on the same Account together with a List of some Philosophical Implements that will be wanted towards our...
29From Benjamin Franklin to Peter Collinson, 15 June 1756 (Franklin Papers)
ALS : University of Pennsylvania Library I can now only acknowledge the Receipt of your Favours of Feb. 12, 21, 24, 29, and April 1. together with two Boxes, containing Parcels for the Library and John Bartram, all safe and deliver’d. Enclos’d is a 2d Bill for £20 Sterling; the first went in March. When receiv’d please to credit my private Account with it. I send also two other Bills of £50...
30From Benjamin Franklin to Peter Collinson, 23 September 1756 (Franklin Papers)
Duplicate: Pierpont Morgan Library I enclose three Bills, viz. A second for £50 Sterling, drawn by Thos. Saul on Wm. Baker. A first — £20 — — Mary Steevens—Alexr. Grant. A first — £30 — — Philip Ludwell Wm. Bowden. When paid, please to Credit my Account with them. I am Yours most affectionately P.S. We agree perfectly well with the Governor, but are very angry with the Proprietors and the...