Colin Maclaurin

"After this he quitted the University, and retired to a country seat of his uncle, who had the care of his education; his parents being dead some time."

"Here he spent two or three years in pursuing his favourite studies; but, in 1717, at 19 years of age... he offered himself a candidate for the Professorship of Mathematics in the of , and obtained it after a ten days' trial against a very able competitor."

"In 1719... Maclaurin visited London... where he became acquainted with Dr. Hoadley... Bishop of Bangor, Dr. Clarke, Sir Isaac Newton, and other eminent men; at which time... he was admitted... [to] the ..."

"In 172S, Lord Polwarth... engaged Maclaurin to go as a tutor and companion to his eldest son... on his travels. After... Paris, and... other towns in France, they fixed in Lorrain; where he wrote his piece, On the Percussion of Bodies, which gained... the prize of the Royal Academy of Sciences... 1724. But his pupil dying soon after at Montpelier, he returned... to his profession at Aberdeen."

"He was hardly settled... when he received an invitation to Edinburgh... University... that he should supply the place of Mr. James Gregory, whose great age and infirmities had rendered him incapable of teaching."

"He had here some difficulties to encounter, arising from competitors... and... from the want of an additional fund... which, however, at length were all surmmounted, principally by the means of Sir Isaac Newton."

"[M]athematical classes soon became very numerous... generally upwards of 100 students attending his Lectures... who being of different standings and proficiency, he was obliged to divide them into four or five classes..."

"In the first class he taught the first 6 books of Euclid's Elements, Plane Trigonometry, Practical Geometry, the Elements of Fortification, and an Introduction to Algebra. The second class studied Algebra, with the 11th and 12th books of Euclid, Spherical Trigonometry, Conic Sections, and the General Principles of Astronomy. The third... in Astronomy and Perspective... a part of Newton's Principia, and... experiments... illustrating them: he afterwards... demonstrated the Elements of Fluxions. Those in the fourth class read a System of Fluxions, the Doctrine of Chances, and the remainder of Newton's Principia."

"In 1734, Dr. Berkley, , published a piece called ... which he took occasion, from... disputes... concerning the grounds of the fluxionary method, to explode the method... and... charge mathematicians... with infidelity in religion."

"Maclaurin thought himself included in this charge, and began an answer to Berkley's book: but [so many] other answers... discoveries... new theories and problems occurred to him, that, instead of a vindicatory pamphlet he produced a Complete System of Fluxions, with their application to the most considerable problems in Geometry and Natural Philosophy."

"This work was published at Edinburgh in 1742, 2 vol. 4to.; and as it cost him infinite pains, so it is the most considerable of all his works, and will do him immortal honour, being indeed the most complete treatise on that science... yet..."

"In the mean time, he was continually obliging the public with some observation or performance of his own, several of which were published in the 5th and 6th volumes of the Medical Essays at Edinburgh."

"Many... were... published in the Philosophical Transactions; as the following: 1. On the Construction and Measure of Curves, vol. 30.---2. A New Method of describing all Kinds of Curves, vol. 30.---3. On Equations with impossible Roots, vol. 34.---4. On the Roots of Equations, &c. vol. 34.---5. On the Description of Curve Lines^ vol. 39.---6. Continuation of the same, vol. 39.---7. Observations on a Solar Eclipse, vol. 40.---8. A Rule for finding the Meridional Parts of a Spheroid with the same Exactness as in a Sphere, vol. 41.---9. An Account of the Treatise of Fluxions, vol. 42.---10. On the Bases of the Cells where the Bees deposit their Honey, vol. 42."

"[H]e was always ready to lend his assistance in contriving and promoting any scheme which might contribute to the public service."

"When the Earl of Morton went... 1789, to... his estates in Orkney and Shetland, he requested... Maclaurin to assist him in settling the geography... very erroneous in all our maps; to examine their natural history, to survey the coasts, and to take the measure of a degree of the meridian. ...[F]amily affairs would not permit him to comply... [so] he drew up a memorial of what he thought necessary to be observed, and furnished proper instruments... recommending Mr. Short, the noted optician, as... operator..."

"Mr. Maclaurin had... another scheme for the improvement of geography and navigation... the opening of a passage from Greenland to the South Sea by the North Pole. That such a passage might be found, he was so fully persuaded, that he used to say, if his situation could admit... he would undertake the voyage even at his own charge."

"But when schemes... were laid before the Parliament in 1744, and... before he could finish the memorials he proposed to send, the premium was limited to the... North West passage: and he used to regret that the word West was inserted, because he thought that passage, if at all to be found, must lie not far from the Pole."

"In 1745, having been... active in fortifying the city of Edinburgh against the rebel army, he was obliged to fly from thence into England, where he was invited by Dr. Herring, Archbishop of York, to reside with him... however, being exposed to cold and hardships, and... of a weak and tender constitution... much more enfeebled by close application to study, he laid the foundation of an ilness which put an end to his life in June 1746, at 48 years of age, leaving his widow with two sons and three daughters."

"Mr. Maclaorin was a very good as well as a very great man, and worthy of love as well as admiration."

"His... merit as a philosopher was, that all his studies were accommodated to general utility; and we find, in many places of his works, an application even of the most absruse theories to the perfecting of mechanical arts. For the same purpose, he had resolved to compose a course of Practical Mathematics, and to rescue several useful branches of the science from the ill treatment... often met with in less skilful hands. These intentions... were prevented fay his death; unless we... reckon, as a part of his intended work, the translation of... David Gregory's Practical Geometry, which he revised, and published with additions, in 1745."

"In his life-time..., he had frequent opportunities of serving his friends and his country by his great skill."

"Whatever difficulty occurred concerning the constructing or perfecting of machines, the working of mines, the improving of manufactures, the conveying of water, or the execution of any public work, he was always ready to resolve it."

"He was employed to terminate some disputes of consequence that had arisen at Glasgow concerning the gauging of vessels; and for that purpose, presented to the commissioners of the excise two elaborate memorials, with their demonstrations, containing rules by which the officers now act."

"He made... calculations relating to the provision, now established by law, for the children and widows of the Scotch clergy, and of the professors in the Universities, entitling them to certain annuities and sums upon the voluntary annual payment of a certain sum by the incumbent. In contriving and adjusting this wise and useful scheme he bestowed a great deal of labour, and contributed not a little towards bringing it to perfection."

"In 1740, he... shared the prize of the... [Royal] Academy with ... D. Bernoulli and Euler, for resolving the problem relating to the motion of the tides from the theory of gravity... He bad only ten days to draw up this paper in, and could not... transcribe a fair copy; so ... the Paris edition... is incorrect. He afterwards revised the whole, and inserted it in his Treatise of Fluxions."

"Since his death... two... volumes have appeared; his Algebra, and his Account of Sir Isaac Newton's Philosophical Discoveries."

"The Algebra, though not finished by himself, is... excellent in its kind; containing, in no large volume, a complete elementary treatise of that science, as far as it has hitherto beea carried; besides some neat analytical papers on curve lines."

"His Account of Newton's Philosophy was occasioned in the following manner:---Sir Isaac dying in the beginning of 1728, his nephew, Mr. Conduitt, proposed to publish an Account of his Life, and desired Mr. Maclaurin's assistance. The latter, out of gratitude to his great benefactor, cheerfully undertook, and soon finished, the History of the Progress which Philosophy had made before Newton's time; and this was the first draught of the work in hand, which, not going forward on account of Mr. Conduitt's death, was returned to Mr. Maclaurin. To this he afterwards made great additions, and left; it in the state in which y it now appears."

"His main design seems to have been to explain only those parts off Newton's Philosophy which have been controverted: and this is supposed to be the reason why his grand discoveries concerning light and colours, are but transiently and generally touched upon; for it is known, that whenever the experiments, on which his doctrine of light and colours is foimded, had been repeated with due care, this doctrine had not been contested; while his accounting for the celestial motions, and the other great appearances of nature, from gravity, had been misunderstood, and even attempted to be ridiculed."