"[H]aving, in 1742, invented an open stove for the better warming of rooms, and at the same time saving fuel, as the fresh air admitted was warmed in entering, I made a present of the model to Mr. , one of my early friends, who having an iron furnace, found the casting of the plates for these stoves a profitable thing, as they were growing in demand. To promote that demand, I wrote and published a pamphlet, entitled, "An Account of the new-invented Pennsylvania Fire Places; wherein their construction and manner of operation is particularly explained, their advantages above every method of warming rooms demonstrated; and all objections that have been raised against the use of them, answered and obviated, &c." This pamphlet had a good effect; governor Thomas was so pleased with the construction of this stove as described in it, that he offered to give me a patent for the sole vending of them for a term of years; but I declined it, from a principle which has ever weighed with me on such occasions, viz: That as we enjoy great advantages from the inventions of others, we should be glad of an opportunity to serve others by any invention of ours; and this we should do freely and generously."