1From Thomas Jefferson to Robert Patterson, 27 March 179[8] (Jefferson Papers)
In the lifetime of mr Rittenhouse I communicated to him the description of the mouldboard of a plough which I had constructed, and supposed to be what we might term the mould-board of least resistance . I asked not only his opinion but that he would submit it to you also. after he had considered it, he gave me his own opinion that it was demonstrably what I had supposed, and I think he said he...
2From Thomas Jefferson to Robert Patterson, 30 March 1798 (Jefferson Papers)
I am much obliged by your letter of yesterday. tho’ I possess Emerson’s fluxions at home, & it was the book I used at College, yet it had escaped me that he had treated the question of the best form of a body for removing an obstacle in a single direction. that of the wedge offered itself so readily as the best, that I did not think of questioning it. nor does it now occur to me on what...
3From Thomas Jefferson to Robert Patterson, 31 March 1798 (Jefferson Papers)
I return you Emerson with thanks. it has suggested a qualification of the expression in my letter , which had supposed the [wedge] the form offering least resistance to the rising sod.—I did at f[irst], as you do now, consider this mould board as a twisted plane. but a little reflection convinced me, as it will you, that it is not, and that it would be impossible to twist a board into that...
4From Thomas Jefferson to Robert Patterson, 10 December 1800 (Jefferson Papers)
The annual period for electing a President of the American Philosophical society being now approaching, and no circumstances rendering it probable that I may be able to attend their sessions in Philadelphia it is become my duty to desire the society to turn their views to some other person, better situated and more capable of discharging the functions of their President. permit me to do this...
5From Thomas Jefferson to Robert Patterson, 22 March 1802 (Jefferson Papers)
I recieved your favor by mr Engles . the place desired for him is not given by commission from me, but is a mere appointment by letter from the Secretary at war, and consequently rests solely with him, without my interposition. nevertheless I sent him your letter, and afterwards stated to him the weight of your testimony. you have no conception of the number of applicants for this office. the...
6From Thomas Jefferson to Robert Patterson, 17 April 1802 (Jefferson Papers)
Your favor of the 12th. is duly recieved. mr Barnes will write by the present post to his friend mr Michael Roberts inclosing funds to enable him to pay the bill for the Hadley’s quadrant and thermometers, which I will pray you to direct the person from whom they are bought to have packed properly: but first to have a stand accomodated to the quadrant: for tho’ at sea the hand is the only...
7From Thomas Jefferson to Robert Patterson, 16 October 1802 (Jefferson Papers)
The inclosed is merely the letter of form communicating the paper it covers to the society. but I promised Capt Groves to write you a private & more particular one. he has proposed a new method of observing the eclipses of Jupiter’s satellites at sea. you will percieve that he is not expert at explaining his ideas. he has invented an instrument too for making the observations, but what are...
8From Thomas Jefferson to Robert Patterson, 2 March 1803 (Jefferson Papers)
I am now able to inform you, tho’ I must do it confidentially, that we are at length likely to get the Missouri explored, & whatever river heading with that, leads into the Western ocean. Congress by a secret act has authorised me to do it. I propose to send immediately a party of about ten men with Capt Lewis, my secretary, at their head. if we could have got a person perfectly skilled in...
9From Thomas Jefferson to Robert Patterson, 28 April 1804 (Jefferson Papers)
I recieved yesterday your favor of the 18th. with Doctr. Moore’s letter inclosed. by a mistake of the member of Congress who proposed the appropriation for the missions to explore Louisiana, 3000. D. only were given instead of 10, or 12,000. which were deemed necessary. for I had proposed to send two such missions. this error reduced me to a single one, & I fixed on that of the Red and Arkansa...
10From Thomas Jefferson to Robert Patterson, 10 January 1805 (Jefferson Papers)
The bearer hereof mr Cosa is an Italian Physico-mechanic. he employs himself chiefly in instruments of glass, and executes ingenious things in that line. he has been here about a month, during which time, as far as I have learnt, he has conducted himself correctly. being desirous to go to Philadelphia where he expects to find more employment, he has asked to be made known to some one who might...