Томас Юнг цитаты
Томас Юнг
Дата рождения: 13. Июнь 1773
Дата смерти: 10. Май 1829
То́мас Юнг — английский учёный широкого профиля: физик , механик, врач , астроном, филолог и востоковед . Полиглот — владел 13 языками. Учёный секретарь Королевского общества по переписке с заграницей . В 1801—1803 годах был профессором Королевского института в Лондоне. С 1818 года — секретарь Бюро долгот и редактор «Морского альманаха». Иностранный член Французской академии наук и Шведской королевской академии наук . Занимаясь египтологией, вплотную подошёл к расшифровке древнеегипетской иероглифики, в англоязычном мире именно Юнг, а не Шампольон, считается дешифровщиком египетского письма. За широту интересов и фундаментальность вклада в науку биограф Эндрю Робинсон охарактеризовал Юнга как «последнего человека, который знал всё».
Цитаты Томас Юнг
„With respect to the mathematical part of optics, the curvature of the images, formed by lenses and mirrors, has been correctly investigated, and the inaccuracy of some former estimations has been demonstrated.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„The passive strength of materials of all kinds has been very fully investigated, and many new conclusions have been formed respecting it, which are of immediate importance to the architect and to the engineer, and which appear to contradict the results of some very elaborate calculations.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„With respect to the cohesion and capillary action of liquids, I have had the good fortune to anticipate Mr. Laplace in his late researches, and I have endeavoured to show, that my assumptions are more universally applicable to the facts, than those which that justly celebrated mathematician has employed.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„In the hydraulic and optical part, may be enumerated an over flowing lamp; a simplification of the rules for finding the velocity of running water; remarks on the application of force to hydraulic machines; a mode of letting out air from water pipes; an analysis of the human voice; and some arrangements for solar microscopes, and for other optical instruments of a similar nature.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„have enumerated, in a compendious and systematical form, the principal facts which have been discovered with respect to galvanic electricity; and I have fortunately been able to profit by Mr. Davy's most important experiments, which have lately been communicated to the Royal Society, and which have already given to this branch of science a much greater perfection, and a far greater extent, than it before possessed.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„The arrangement of the whole work is probably different… from any other… the extent of the subjects… rendered it necessary to preserve a… methodical and uniform system; and it is presumed, that this arrangement will be… of some value, especially in a work calculated to serve as a key, by means of which, access may be obtained to all the widely scattered treasures of science; and which will enable those… desirous of extending their researches in any particular department, to obtain expeditiously all the information that books can afford them.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„The theory of the tides has been reduced into an extremely simple form, which appears to agree better with all the phenomena, than the more intricate calculations which they have commonly been supposed to require.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„The historical part of the work can scarcely be called new, but several of the circumstances, which are related, have escaped the notice of former writers on the history of the sciences.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„Physic is one of those departments, in which there is frequent necessity for the exercise of an incommunicable faculty of judgment, and a sagacity, which may be called transcendental, as extending beyond the simple combination of all that can be taught by precept. Nor is there any other mode of cultivating these powers, than by pursuing a much more extensive range of elementary study, than appears, to a common and superficial observer, to be in any way connected with the immediate objects of the profession.“
Источник: An Introduction to Medical Literature, Including a System of Practical Nosology (1823), p. 5
„[T]he lectures… may be expected to remain tolerably commensurate to the state of the sciences for a much longer period; since, in investigations so intimately connected with mathematical principles, the essential improvements will always bear a very small proportion to the number of innovations. …the references, which it contains, are… sufficient to lead those, who may consult the passages quoted, to the works of every author of eminence that has treated of the respective subjects.“
Preface
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„I have resolved to confine my studies and my pen to medical subjects only. For the talents which God has not given me, I am not responsible, but those which I possess, I have hitherto cultivated and employed as diligently as my opportunities have allowed me to do; and I shall continue to apply them with assiduity, and in tranquillity, to that profession which has constantly been the ultimate object of all my labours.“
Letter X: Reply to the Edinburgh Reviewers, Miscellaneous works of the late Thomas Young https://archive.org/details/miscellaneouswo01youngoog (1855), p. 215
„The fundamental doctrines of motion have [herein]… been more immediately referred to axioms simply mathematical than has hitherto been usual; and the application of these doctrines to practical purposes has [herein]… been facilitated.“
Preface (March 30, 1807)
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„I have… begun to collect materials for a work… relating to every department of medical knowledge: …it will be comparatively more concise than these lectures, in proportion to what has been said and written respecting physic, but, I hope, much more complete, with regard to all that is known with certainty, and can be applied with utility.“
Preface (March 30, 1807)
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„There is no study more difficult than that of physic: it exceeds, as a science, the comprehension of the human mind: and those who blunder onwards, without attempting to understand what they see, are often very nearly on a level with those, who depend too much on imperfect generalisations, applied to facts, which can scarcely be subjected to any well marked analogy. Hence it may happen, that talents and labour may become useless for want of a proper direction… To assist in furnishing the student with a sufficient direction… is the principal object of this work.“
Источник: An Introduction to Medical Literature, Including a System of Practical Nosology (1823), p. 2
„Besides these improvements,… there are others,… which may… be interesting to those… engaged in those departments… Among these may be ranked, in the division of mechanics, properly so called, a simple demonstration of the law of the force by which a body revolves in an ellipsis; another of the properties of; a calculation of the effect of temperature on steel springs; an easy determination of the best line of draught for a carriage; an investigation of the resistance to be overcome by a wheel or roller; and an estimation of the ultimate pressure produced by a blow.“
Preface, pp. ix-x
A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)
„When I was a boy, I thought myself a man. Now that I am a man, I find myself a boy.“
as quoted by Horatio B. Williams, Thomas Young, The Man and Physician, J. Opt. Soc. Am. 20, 35-49 (1930).
„It is surprising that so great a mathematician as Dr. Smith could have entertained for a moment, an idea that the vibrations constituting different sounds should be able to cross each other in all directions, without affecting the same individual particles of air by their joint forces: undoubtedly they cross, without disturbing each other's progress; but this can be no otherwise effected than by each particle's partaking of both motions. If this assertion stood in need of any proof, it might be amply furnished by the phenomena of beats, and of the grave harmonics observed…“
"Outlines of Experiments and Inquiries Respecting Sound and Light" (1800)
„A permanent alteration of form limits the strength of materials with regard to practical purposes, almost as much as fracture; since, in general, the force which is capable of producing this effect is sufficient, with a small addition, to increase it till fracture takes place.“
(1807) Nat. Phil. Vol. i, p. 14. as quoted by Robert Henry Thurston, Materials of Engineering (1884) Part III https://books.google.com/books?id=0p1BAAAAIAAJ p. 548.
