Part 35

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Footnote 142:

It appears that Mr. Barton must have transmitted to the honourable Mr. T. Penn, in London, a description of the Orrery, very soon after it was publicly communicated to the Philosophical Society in Philadelphia; for, a letter from Mr. Penn to that gentleman, dated July 22, 1768, contains this remark—“The account you give me of Mr. Rittenhouse’s Orrery, is what I could not have imagined could be executed in Pennsylvania; and I shall be much pleased to see a copper-plate of it, for which I would make that gentleman a present, for his encouragement; or, perhaps he may be induced to bring it hither, and exhibit it, by publicly lecturing on it.”

Had Mr. Rittenhouse taken an Orrery to England, and it appears by his letters of March 15, 1771, and Feb. 3, 1772, quoted in the text, that he had seriously intended going thither, he would, very probably, have derived great emolument, as well as fame, by delivering lectures on astronomy, adapted to his orrery; and it is probable, that, in addition to the public encouragement he might reasonably have calculated upon, Mr. Penn would have patronised him, with his usual liberality. Of the disposition of that worthy gentleman to befriend him, Mr. Rittenhouse seems to have been fully sensible: for, in a letter of the 11th of December, 1768, to Mr. Barton, he said—“I am very desirous to send Mr. Penn something: as the orrery is not finished, perhaps a description of it, with draughts of the clock I have just made, may answer the purpose, together with some little instrument: I shall be glad to have your thoughts on the matter.” It may be proper here to remark, that no engraving, or drawing, could give an adequate idea of the orrery: and that the clock, mentioned by Mr. Rittenhouse, was one of those of which a short notice is introduced, immediately after the original description of the orrery, in the text.

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The Orrery was, nevertheless, then his favourite object. On the 18th of June, 1767, he wrote to Mr. Barton, thus—“I hope you will persuade your Pequea friends to stay for the clocks, till harvest is over; and then, I think, I may venture to promise them, for ready money: but, at this time, one part of the Orrery is in such forwardness, that I am not willing to lay it by till it is done. I hope it will far exceed the description I gave you of it. To-morrow morning I am to set off for Reading, at the request of the Commissioners of Berks county, who wrote to me about their town-clock. They had employed a ... to make it, who, it seems, is not able to go through with it: if I should undertake to finish it, this will likewise retard the great work.”

Amidst the more important philosophical pursuits which engaged Mr. Rittenhouse’s attention before his removal to Philadelphia, as well as after he fixed his residence in that city, he now and then relaxed the energy of his mind from its employment in laborious investigations, by bestowing a portion of his time on minor objects in physical science; and indeed, sometimes, even on little matters of ingenuity, curiosity and amusement. As instances of this, he addressed to the Rev. Mr. Barton the letter under the date of the 20th of July, 1768, which will be found in the Appendix; and also another, dated the 4th of February, 1770, to which there is the following postscript:

“I have,” says he, “seen a little curiosity, with which you would be pleased; I mean the glass described by Dr. Franklin, wherein water may be kept in a boiling state, by the heat of the hand alone, and that for hours together. The first time I shall be in Lancaster, where I hope to be next June, I expect to prevail on you to accompany me to the Glass-house, where we may have some of them made, as well as some other things I want.”—A description of this instrument, then usually called Dr. Franklin’s Pulse-Glass, by means of which water may be made to boil, in vacuo, by the heat of the human hand, was communicated by Mr. Rittenhouse to Mr. Barton in a subsequent letter.

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Footnote 143:

The glass-house mentioned in the text, was erected several years prior to the American revolutionary war, at the village of Manheim, about twelve miles from the borough of Lancaster, by Mr. Henry William Stiegel, an ingenious and enterprising German gentleman. Glass of a very good quality and workmanship, was made at that glass-house; as will appear by the following extracts from a letter of Mr. Rittenhouse to Mr. Barton, written in the summer of 1771, and acknowledging the receipt of a barometer-tube executed there. He says—“I am obliged to you for the glass tube; it will make a pretty barometer, though the bore is somewhat too small. I have compared it with an English tube, and do not think the preference can, with any reason, be given to the latter.” And in the same letter, he requests Mr. Barton to procure for him, from the glass-house, “some tubes of a size fit for spirit-levels.” “The bore,” says he, “must be half an inch in diameter, and from four to eight inches in length; as straight as possible, and open at one end only.”

While Mr. Stiegel was thus early and meritoriously carrying on the manufacture of glass, he was also engaged in manufacturing iron at Elizabeth-Furnace in the vicinity, which then belonged to him. But he proved unfortunate in his extensive undertakings, and the glass-works have not since been in operation. The foundery of Elizabeth, together with the great establishment of iron-works connected with it, and of which Robert Coleman, Esq. of Lancaster, is now the proprietor, are well known.

Footnote 144:

Dr. Franklin is said to have first met with the Pulse-Glass in Germany, and to have introduced it into England with some improvement of his own.

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MEMOIR OF THE LIFE OF DAVID RITTENHOUSE; CONTINUED, FROM THE TIME OF HIS SETTLEMENT IN PHILADELPHIA.

In the autumn of 1770, our Philosopher changed the place of his residence; removing, with his family, into the city of Philadelphia. To this exchange of his beloved retirement, at his Norriton farm, for the scene of noise and activity presented by a great town, he must have been induced by the flattering prospects of advantage to himself and usefulness to the public, pointed out to him by his friends: and among these, Dr. Smith was one of the most urgent for the measure. The following extract of a letter, dated the 27th of January, 1770, and addressed to the Rev. Mr. Barton by that gentleman, will explain his motives, and at the same time exhibit Mr. Rittenhouse’s views, on that occasion: it will also afford strong evidence of the Doctor’s friendship for our philosopher.

“As my esteem for Mr. Rittenhouse increases, the more I know him,” said Dr. Smith, “I set on foot a project, assisted by my neighbours, the Wissahickon millers, to get him recommended to the Assembly, to be put in as a trustee of the loan-office, in the bill now before the house. I first broke the matter to the speaker; telling him, Mr. Rittenhouse ought to be encouraged to come to town, to take a lead in a manufacture, optical and mathematical, which never had been attempted in America, and drew thousands of pounds to England for instruments, often ill finished; and that it would redound to the honour of Philadelphia to take a lead in this, and of the Assembly, to encourage it. The speaker took the proposal well, and, in short, so did every person applied to; and when the vote passed, the day before yesterday, for the three trustees, the whole house rose for Rittenhouse’s name; so that Mr. Allen, who was hearty among the rest for him, observed—“Our name is Legion, for this vote,”—though Dr. M—— got in only by the speaker’s casting vote.

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Footnote 145:

Joseph Galloway, Esq. a representative in assembly from the county of Bucks. He was speaker of the house, from the year 1766 to 1773, inclusively; excepting a short interval in the session of 1768-9, in which Joseph Fox, Esq. officiated as speaker.

Footnote 146:

William Allen, Esq. chief-justice of the supreme court of Pennsylvania, and a member of assembly from the county of Cumberland.

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“This will give you pleasure, as it shews that a good man is capable of sometimes commanding all parties; and it will be creditable for Mr. Rittenhouse, even if the bill should not succeed for the present. The salary to each of the trustees is 200l. Both the Mr. Ross’s, Mr. Biddle, and Mr. Carpenter, were hearty in their interest for Rittenhouse,—so was Minshull; and I hope you will thank them all. The governor declared (and with more frankness than usual,) when I waited on him,—“Mr. Rittenhouse’s name shall never be an objection with me, in this or any other bill: on the contrary, I shall rejoice if the bill come to me in such a form, as that I can shew my regard for him.”

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Footnote 147:

Equal to 533 Spanish or American dollars.