1To Thomas Jefferson from Robert Patterson, 29 March 1798 (Jefferson Papers)
The drawings, model, and description of your mold-board of least resistance , which you have been pleased to submit to my inspection, and which I had not seen before, I have now examined with much attention and pleasure; and do not hesitate in giving it my approbation, if that can be thought of any consequence after the one it has already received from Mr. Rittenhouse. The doctrine of...
2To Thomas Jefferson from Robert Patterson, 25 March 1800 (Jefferson Papers)
I take the liberty of introducing the bearer Mr. Smith an acquaintance of mine from Bucks county. He wishes to see the model of your mould-board , as he and his brother have turned their attention a good deal to that subject. He has with him the description and model of a mouldboard for which he has had thoughts of obtaining a patent—It is I believe the spiral or twisted-board, which, in...
3To Thomas Jefferson from Robert Patterson, 2 January 1801 (Jefferson Papers)
I duly received your favour of the 10th. of last month, and communicated your desire to the Society at their meeting on the 19th. I perceived, however, among the members, an universal wish of continuing you at the head of their Institution: For though they would highly prize the advantage of your personal presence at their sessions, yet they considered this as but of secondary importance—and,...