It is a fact worthy of notice, that the establishment of paper-mills in Pennsylvania, by the Rittenhouses, was nearly co-eval with the general introduction of the manufactory of white paper in the mother country. This appears from the following circumstance:—There is now before the writer of these memoirs a paper in the hand-writing of the celebrated William Penn, and subscribed with his name, certifying that “William Rittinghousen and Claus” (Nicholas) “his son,” then “part owners of the paper-mill near Germantown,” had recently sustained a very great loss by a violent and sudden flood, which carried away the said mill, with a considerable quantity of paper, materials and tools, with other things therein, whereby they were reduced to great distress; and, therefore, recommending to such persons as should be disposed to lend them aid, to give the sufferers “relief and encouragement, in their needful and commendable employment,” as they were “desirous to set up the paper-mill again.”—This certificate is without date: but Mr. Penn was twice in Pennsylvania. He first arrived in the year 1682, and returned to England in 1684; his second arrival was in 1699, and he finally left the province in 1701. It was probably during the latter period of his residence in his proprietary-dominion, though, perhaps, in the first, that the Germantown paper-mills were destroyed. The William Rittinghousen (so Mr. Penn writes the name) here mentioned, is supposed to be the same named in the text, and to have been the great-grandfather of our astronomer. In Mr. Penn’s certificate he is called an old man, and is stated to have then been “decrepid.” In order to shew the present importance of that article, as a manufacture, in the United States, and which was first fabricated in this country by the Rittenhouses, the reader is presented with the following view of the quantity of paper, of various descriptions, annually made at one hundred and eighty-five paper-mills, within the United States; taken from the latest information furnished on this subject. Tons. Reams. Value. For Newspapers,[59a] 500 50,000 $150,000 Books, 630 70,000 245,000 Writing, 650 111,000 333,000 Wrapping, 800 100,000 83,000 —-— —-—-— —-—-— 2580 331,000 811,000 Footnote 59a: The number of Newspapers, printed annually in the United States, is estimated at twenty-two and an half millions. Footnote 60: