Christiaan Huygens experimented with gunpowder in 1673 in an early attempt to build an internal combustion engine, but he did not succeed.

Christiaan Huygens proved in 1673 that the pivot point and the center of oscillation are interchangeable.

The second pendulum clock, built by Christiaan Huygens in 1673.

His ideas attracted interest at the time, and were supported by both Jean Picard and Christiaan Huygens in 1673, and also studied at the Royal Society in London.

In 1673 Dutch scientist Christiaan Huygens in his mathematical analysis of pendulums, Horologium Oscillatorium, showed that a real pendulum had the same period as a simple pendulum with a length equal to the distance between the pivot point and a point called the center of oscillation, which is located under the pendulum's center of gravity and depends on the mass distribution along the length of the pendulum.

In 1673, while working with Christiaan Huygens and Gottfried Leibniz in Paris, he became interested in using a vacuum to generate motive power.

In 1673 Christiaan Huygens derived the equation for the center of oscillation and oscillation period of compound pendulums, thus making use of the general equation for the moment of inertia for the first time.

The notions of the involute and evolute of a curve were introduced by Christiaan Huygens in his work titled Horologium oscillatorium sive de motu pendulorum ad horologia aptato demonstrationes geometricae ( 1673 ).

In 1673, 17 years after he invented the pendulum clock, Christiaan Huygens published his mathematical analysis of pendulums, Horologium Oscillatorium.

In 1673, Huygens carried out experiments with internal combustion.

However, Huygens is sometimes credited with being the first to study them ( 1673 ).

The second verge pendulum clock built by Christian Huygens, inventor of the pendulum clock, 1673.

Reflecting " partisan public sentiment on an English-Protestant national holiday ", in the published editions of 1645 and 1673 the poem is preceded by five epigrams on the subject of the Gunpowder Plot, apparently written by Milton in preparation for the larger work.

In 1673, his earliest observations were published by the Royal Society in its journal: Philosophical Transactions.

In 1673 he published his mathematical analysis of pendulums, Horologium Oscillatorium sive de motu pendulorum, his greatest work on horology.

He proved geometrically in his Horologium oscillatorium, originally published in 1673, that the curve was a cycloid.

This second comedy was published in 1673, but was probably acted late in 1671.

The Country Wife, produced in 1672 or 1673 and published in 1675, is full of wit, ingenuity, high spirits and conventional humour.

The first successful attempts at written Romanian-language poetry were made in 1673 when Dosoftei, a Moldavian metropolitan in Iaşi, published a Romanian metrical psalter.

Gottfried Leibniz developed his calculus around 1673, and published it in 1684, fifty years before Newton.

From his book Machina coelestis ( first part ), published in 1673.

The potential advantages of using parabolic mirrors, primarily reduction of spherical aberration with no chromatic aberration, led to many proposed designs for reflecting telescopes the most notable being James Gregory ’ s 1663 published ideas for what came to be called the Gregorian telescope, but no working models were built until 1673 by Robert Hooke.

Dosoftei, a Moldavian published in Poland in 1673, was the first Romanian metrical psalter, producing the earliest known poetry written in Romanian.

Aside from his influential architecture, he is best regarded for his translation of the ten books of Vitruvius, the only surviving Roman work on architecture, into French, done at the instigation of Colbert, and published, with Perrault's annotations, in 1673.

In 1673 he published his Idea of a Phytological History, which consisted of papers he had communicated to the Royal Society in the preceding year, and in 1677 he succeeded Henry Oldenburg as secretary of the society.

It was published in late 1673 and closely followed by English, German, French and Dutch translations.

The book was published in late 1673 and quickly translated to French, German, English, and other languages ( though not to Swedish until 1956 ).

Saint John of Ávila's works were collected at Madrid in 1618, 1757, 1792 and 1805 ; a French translation by d ' Andilly was published at Paris in 1673 ; and a German translation by Schermer in six volumes was issued at Regensburg between 1856 and 1881.

* F. W. Moorman, Yorkshire dialect poems: ( 1673 – 1915 ) and traditional poems, published for the Yorkshire Dialect Society by Sidgwick and Jackson, 1916.

In 1661 Samuel Pordage published a pamphlet, ‘ Heroick Stanzas on his Maiesties Coronation .’ In 1673 his ‘ Herod and Mariamne ,’ a tragedy, was acted at the Duke's Theatre, and was published anonymously.

It is named for the English physician and anatomist Thomas Wharton ( 1614 – 1673 ) who first described it in his publication Adenographia, or " The Description of the Glands of the Entire Body ", first published in 1656.

An English abridgement of this novel was published in 1673.

Note: Two collections were published as opus 10, Acclamationi Divote ( 1670 ) and La Cetra ( 1673 ).

The mystical poem " Book of Lamentations " ( published in 1673 in Marseille ) has been translated into many languages and has played a significant role in the development of the Armenian literary language.

In 1673 Locke's treatise on music theory, Melothesia, was published.

He had a high reputation as a Grecian, a Latinist and a philologist, and he brought out with the collaboration of others his an edition of St Cyprian in 1682, an English translation of The Unity of the Church in 1681, editions of Nemesius of Emesa ( 1671 ), of Aratus and of Eratosthenes ( 1672 ), Theocritus ( 1676 ), Alcinous on Plato ( 1677 ), St Clement's Epistles to the Corinthians ( 1677 ), Athenagoras ( 1682 ), Clemens Alexandrinus ( 1683 ), Theophilus of Antioch ( 1684 ), Grammatica rationis sive institutiones logicae ( 1673 and 1685 ), and a critical edition of the New Testament in 1675.

The kings of the Ancien Régime and the July Monarchy used the title Empereur de France in diplomatic correspondence and treaties with the Ottoman emperor from at least 1673 onwards.

* 1673 – Antonio de Literes, Spanish composer ( d. 1747 )

* 1641 – Regnier de Graaf, Dutch physician and anatomist ( d. 1673 )

On 25 June 1673, while preparing to storm the city, captain-lieutenant Charles de Batz de Castelmore, also known as the comte d ' Artagnan, was killed by a musket shot outside Tongerse Poort.

* Dissertatio epistolica de formation pulli in ovo, 1673

With this legal handbook of criminal cases in the tradition of the famous " Causes Célèbres " of the Franch lawyer Gayot de Pitaval ( 1673 – 1743 ) Feuerbach intend to establish a modern criminal psychology (" Seelenkunde ") for crime investigation, criminal judges, etc.

Other recusant families, or branches thereof, include ( d ) Ainscough, Anne ( of Frickley ), Arden ( of Longcroft ), Arundell, Bedingfeld, Berkeley ( of Spetchley ), Blount, Blundell, Clifford ( of Chudleigh ; since 1673 ), Coates, Constable, Constable-Maxwell, Errington, Eyre, Eyston, Fairfax ( of Gilling ), Feilding, Fenwick, Fermor ( of Tusmore ), Fitzherbert ( of Swynnerton ), Fitzherbert-Brockholes, Fortescue-Turville, Gerard ( of Bryn ), Gillibrand, Gillow, Glover, Hesketh, Holden, Holman, Hornyold, Huddleston, Jerningham, Kerr ( Scotland ), De Lisle / de Lisle, Mattingly, Mockler-Barrett, Payne, Petre, Perkins ( of Ufton Court ), Riddell, Scarisbrick, Scrope ( of Bolton ), Smythe, Stonor, Stourton, Talbot, Tempest ( of Broughton ), Throckmorton, Towneley, de Trafford, Tichbourne, Trappes-Lomax ( Trappes of Nidd ), Tresham ( of Northamptonshire ), Vavasour ( of Hazlewood ), Ward, Waterton ( of Walton ), Weld, and Weld-Blundell.

* June 16 – Louise-Françoise de Bourbon, eldest daughter of Louis XIV and Madame de Montespan ; she built the Paris Palais Bourbon where she died ( b. 1673 )

* probable – Charles de Batz-Castelmore d ' Artagnan, French count and musketeer, on which the fictional D ' Artagnan from the novel The Three Musketeers is based ( d. 1673 )

* July 30 – Regnier de Graaf, Dutch physician and anatomist ( d. 1673 )

de: 1673

By Louise Renée de Penancoet de Kérouaille ( 1649 – 1734 ), created Duchess of Portsmouth in her own right ( 1673 )

Although Louis took Maastricht and William's attack against Charleroi failed, Lieutenant-Admiral Michiel de Ruyter defeated the Anglo-French fleet three times, forcing Charles to end England's involvement by the Treaty of Westminster ; after 1673, France slowly withdrew from Dutch territory ( with the exception of Maastricht ), while making gains elsewhere.

In 1673, Spain sent a garrison to the island of Peñón de Alhucemas, and it has been permanently occupied since.

In the winter of 1673 the French failed to cross the Water Line over the ice, thwarted both by further thaws and special Dutch sailor companies moving on skates, organised by temporary Lieutenant-Admiral Johan de Liefde.

The first battle of Schooneveld, 7 June 1673 by Willem van de Velde, the elder, painted c. 1684.

In 1673, the governor of New France ( Quebec, the French settlement started by Samuel de Champlain ), sent Jacques Marquette, a Catholic priest and missionary, and Louis Jolliet, a French Canadian fur trader, along with seven other explorers, on a mission to find the Northwest Passage.

Native American Indians, then Spanish explorers such as Francisco Vasquez de Coronado in 1541, and French missionary explorers in 1673 lived and traveled throughout the area of what is now Paola.

* Nieuhof, Johannes, 1618-1672 / " An embassy from the East-India Company of the United Provinces, to the Grand Tartar Cham, emperor of China: delivered by their excellencies Peter de Goyer and Jacob de Keyzer, at his imperial city of Peking wherein the cities, towns, villages, ports, rivers, & c. in their passages from Canton to Peking are ingeniously described by John Nieuhoff ; also an epistle of Father John Adams, their antagonist, concerning the whole negotiation ; with an appendix of several remarks taken out of Father Athanasius Kircher ; Englished and set forth with their several sculptures by John Ogilby " ( 1673 )