Part 90

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Footnote 372:

See Notes on Virginia.

Footnote 373:

All the boundary-lines, mentioned above, were determined by astronomical observations. The manner in which the work was performed, with an account of the instruments used on those occasions, will be found in the fourth volume of the Transactions of the American Philosophical Society. Some of Dr. Rittenhouse’s associates, in those arduous undertakings, were men of high reputation in the same departments of science; but his talents were principally relied on.

Footnote 374:

See Notes on Virginia.

Footnote 375:

Ibid.

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Such, then, were the “Works” of this truly great man. And it appears that they were, in general, not only arduous in their execution, and highly beneficial in their uses and effects; but that they were likewise the productions of a lofty, penetrating and active genius, great knowledge and skill, and the most indefatigable perseverance.

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Footnote 376:

It will, perhaps, have occurred to the reader, that besides such of the WORKS of Dr. Rittenhouse, as are referred to in the text, in some of which, the blended effects of genius, philosophical science and mechanical skill, were equally conspicuous, he put the Mint into operation. In the language of his worthy successor in the direction of that institution, “his lofty and correct mind, capable alike of ascending to the sublimest heights of science, and of condescending to regulate the minute movements of mechanical machinery, organized the Mint, and created the workmen and the apparatus.” His agency in directing the construction, and arranging the operative departments, of this important establishment, though less indicative of extraordinary mechanical genius than many of his other works, was nevertheless an arduous undertaking: it was conducted, as Mr. De Saussure very justly observed, “amidst complicated difficulties, from which the most persevering minds might have shrunk without dishonour.”

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But though Dr. Rittenhouse published no great systematic literary work, he communicated to others by his conversation, and by such of his writings as have been given to the world, much valuable philosophical information. He instructed, liberally, such persons as were desirous of acquiring knowledge from a social intercourse with him. The elevated station his character maintained, both for wisdom and integrity, exhibited him to his cotemporaries as an example worthy of being imitated: and thus, in reality, his high reputation operated as a powerful incitement upon many of his countrymen, to pursue similar objects of science, inspiring them with a taste to cultivate the true philosophy.

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Footnote 377:

Dr. Rush, in his Eulogium on Rittenhouse, has introduced a short invocation, which aptly applies in this place: it is in these words; “Come, and learn by his example to be good, as well as great. His virtues furnish the most shining models for your imitation; for they were never obscured by a single cloud of weakness or vice.”

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The reputation of this distinguished man, as a mathematician and astronomer, was pre-eminently great, in every civilized part of the western world. Perhaps no man’s philosophical talents were ever held in higher estimation, nor more deservedly so, by those qualified to form a proper judgment of them, wherever his name was known; not excepting those of Newton himself. His celebrity was far from being confined within the limits of his native country: his Orrery, with the proceedings and results of the Observation of that phænomenon which so greatly interested the principal astronomers of both hemispheres, the Transit of Venus in 1769, had rendered him justly celebrated in Europe as well as America, as a philosopher of the highest grade, at the age of thirty-seven years.

The peculiar circumstances of his Life, which have been amply detailed in these Memoirs, were of such a nature as to preclude him, in a great measure, from opportunities of carrying on a correspondence with men of science and letters, abroad: the extremely delicate, and oftentimes infirm state of his general health, in addition to his numerous avocations, his long continued, various, and important employments in the public service, left him little leisure for literary pursuits of any kind. Indeed, nothing less than the wonderful energy of his mind, and his extraordinary industry, could have enabled him to write as much as he has done.

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Footnote 378:

Mr. Chief Justice Marshall makes an observation, in reference to General Washington, which applies with equal force to Dr. Rittenhouse. “To estimate rightly his worth, we must contemplate his difficulties: we must examine the means placed in his hands, and the use he made of those means.” Pref. to Marshall’s Life of Washington.

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Dr. Rittenhouse never attempted to amuse the world with any hypothetical system of philosophy, or with opinions, merely speculative, on any subject. The great objects of his pursuits, through life, were Certainty and Truth: hence, he never advanced an opinion, concerning any thing whatever, which he did not consider as being either susceptible of verification by experiment and the evidence of our senses, or, where the nature of the subject did not admit of such proof, capable of being tested by the soundest principles of human reason. Yet, though this profound investigator of nature viewed “sober certainty” as the great desideratum in philosophy, he was by no means a dogmatist; even with respect to that portion of natural science which is capable of demonstration. Notwithstanding the opinion he entertained of the vast extent to which the faculties of the mind may be enlarged by a proper improvement of them, he was fully aware that its powers are limited. Like his great predecessor, Maclaurin, “the farther he advanced in the knowledge of geometry and of nature, the greater his aversion grew to perfect systems, hypotheses, and dogmatizing: without peevishly despising the attainments we can arrive at, or the uses to which they serve, he saw there lay infinitely more beyond our reach.” Like him, also, he considered “our highest discoveries as being but a dawn of knowledge, suited to our circumstances and wants in this life; which, however, we ought thankfully to acquiesce in, for the present, in hopes that it will be improved in a happier and more perfect state.” Rittenhouse never supposed, that, (to use the words of Maclaurin’s biographer), “because demonstrative evidence is the most perfect, it should be—as, by some, it has been—taken for granted, there is no other.” On the contrary, our philosopher believed that there are many truths, natural as well as moral, which are beyond the reach of demonstration; consequently, not to be rejected, solely by reason of their insusceptibility of this kind of proof. Hence, in his Oration he says, “Our Religion teaches us what Philosophy could not have taught; and we ought to admire, with reverence, the great things it has pleased Divine Providence to perform, beyond the ordinary course of nature, for man, who is undoubtedly the most noble inhabitant of this globe. But,” continues this truly good man, “neither Religion nor Philosophy forbid us to believe, that infinite Wisdom and Power, prompted by infinite Goodness, may, throughout the vast extent of creation and duration, have frequently interposed in a manner quite incomprehensible to us, when it became necessary to the happiness of created beings of some other rank or degree.”

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