In 1824 to reduce the impact of this destructive electrolytic action on ships hulls, their fastenings and underwater equipment, the Victorian scientist-engineer Sir Humphry Davy, developed the first and still most widely used marine electrolysis protection system.

The Lavoisier definition was held as absolute truth for over 30 years, until the 1810 article and subsequent lectures by Sir Humphry Davy in which he proved the lack of oxygen in H < sub > 2 </ sub > S, H < sub > 2 </ sub > Te, and the hydrohalic acids.

Boron was not recognized as an element until it was isolated by Sir Humphry Davy and by Joseph Louis Gay-Lussac and Louis Jacques Thénard.

This was confirmed by Sir Humphry Davy in 1810, who named it chlorine, from the Greek word χλωρος ( chlōros ), meaning " green-yellow.

It was not isolated until 1808 in England when Sir Humphry Davy electrolyzed a mixture of lime and mercuric oxide.

The first ever clerihew was written about Sir Humphry Davy:

: Sir Humphry Davy

It was invented in 1815 by Sir Humphry Davy.

Sir Humphry Davy had discovered that a flame enclosed inside a mesh of a certain fineness cannot ignite firedamp.

Sir Humphry Davy's portrait in the 19th century.

Sir Humphry Davy's work with electrolysis led to the conclusion that the production of electricity in simple electrolytic cells resulted from chemical action and that chemical combination occurred between substances of opposite charge.

At the same time, Cornishman Sir Humphry Davy, the eminent scientist was also looking at the problem.

Some degree of safety was provided by the safety lamp which was invented in 1816 by Sir Humphry Davy and independently by George Stephenson.

* 1816 – Sir Humphry Davy tests the Davy lamp for miners at Hebburn Colliery.

Although sodium, sometimes called soda, had long been recognised in compounds, the metal itself was not isolated until 1807 by Sir Humphry Davy through the electrolysis of sodium hydroxide.

" The element was eventually isolated by Sir Humphry Davy in 1808 by the electrolysis of a mixture containing strontium chloride and mercuric oxide, and announced by him in a lecture to the Royal Society on 30 June 1808.

In 1877, the Russian chemist Serge Kern reported discovering the missing element in platinum ore. Kern named what he thought was the new element davyum ( after the noted English chemist Sir Humphry Davy ), but it was eventually determined to be a mixture of iridium, rhodium and iron.

Sir Humphry Davy and Andrew Crosse were among the first to develop large voltaic piles.

* May 29 – Sir Humphry Davy, British chemist ( b. 1778 )

* Earliest preparation of magnesium metal by Sir Humphry Davy.

* January 7 – Sir Humphry Davy tests the Davy lamp for miners at Hebburn Colliery.

* December 17 – Sir Humphry Davy, English chemist ( d. 1829 )

* 1807 – Potassium, sodium, barium, calcium and magnesium were discovered by Sir Humphry Davy using electrolysis.

Sir Humphry Davy, 1830 engraving based on the painting by Sir Thomas Lawrence ( 1769 – 1830 )

* 1819 – Sir George Stokes, 1st Baronet, Irish-English mathematician and physicist ( d. 1903 )

* 1740 – Sir Francis Baring, 1st Baronet, English merchant banker ( d. 1810 )

* 1863 – Sir Robert Bateson, 1st Baronet, Irish nobility ( b. 1782 )

During the Civil War, prior to the siege of Raglan Castle in 1645, King Charles I visited Abergavenny and presided in person over the trial of Sir Trefor Williams, 1st Baronet of Llangibby, a Royalist who changed sides, and other Parliamentarians.

* 1661 – Sir William Brereton, 1st Baronet, English soldier and politician ( b. 1604 )

On the battlefield, it is probably fair to say, Charles was comparable in skill and style to Sir Arthur Wellesley, 1st Duke of Wellington-quite conservative and yet exceedingly competent.

John Churchill, 1st Duke of Marlborough ( 1650 – 1722 ) by Sir Godfrey Kneller.

During the Anglo-French War ( 1627 – 1629 ), under Charles I, by 1629 the Kirkes took Quebec City, Sir James Stewart of Killeith, Lord Ochiltree planted a colony on Cape Breton Island at Baleine, Nova Scotia and Alexander ’ s son, William Alexander, 1st Earl of Stirling established the first incarnation of “ New Scotland ” at Port Royal.

Sir Charles Lyell, 1st Baronet, Kt FRS ( 14 November 1797 – 22 February 1875 ) was a British lawyer and the foremost geologist of his day.

Sir John Gordon ( d. c. 1395 ) of Strathbogie, ancestor of Sir John Gordon, 1st Baronet, was the brother of Elizabeth Gordon.

She married Sir Alexander Seton ( d. 1438 ) and was the mother of Alexander Gordon, 1st Earl of Huntly ( ancestor of the Marquesses of Huntly ).

* Sir John Gordon, 1st Baronet ( 1610 – 1644 )

George Gordon, 1st Earl of Aberdeen ( 6 October 1637 – 20 April 1720 ), Lord Chancellor of Scotland, was the second son of Sir John Gordon, 1st Baronet, of Haddo, Aberdeenshire, ( executed in 1644 ); by his wife, Mary Forbes.

A section of Bernard Ratzer's map of New York and its suburbs, made circa 1766 for Sir Henry Moore, 1st Baronet | Henry Moore, Royal Governor of New York, when Greenwich was more than two miles from the city.

Allied leaders of the Sicilian campaign in North Africa ; ( front row, left to right ) General Dwight D. Eisenhower, Air Chief Marshal Sir Arthur Tedder, 1st Baron Tedder | Arthur Tedder, General Sir Harold Alexander, Admiral Sir Andrew Cunningham, 1st Viscount Cunningham of Hyndhope | Andrew Cunningham, ( top row, left to right ) Harold Macmillan, Major General Walter Bedell Smith, and unidentified British officers ; 1943

* 1643 – English Civil War: Battle of Roundway Down – In England, Henry Wilmot, 1st Earl of Rochester, commanding the Royalist forces, heavily defeats the Parliamentarian forces led by Sir William Waller.

* Sir William Hamilton, 1st Baronet ( c. 1605 – 1680 )