The Board of Agriculture in 1803 had commissioned Sir Humphry Davy to deliver a course of lectures on the connexion of chemistry with vegetable physiology.
By the market house is a statue of Sir Humphry Davy, who was born here in 1778.
Rouelle, while in England Humphry Davy expounded the same idea in the experimental demonstrations which gave his lectures their brilliant charm.
Berzelius's investigation of the action of the electric current on salts clearly demonstrated the invaluable assistance that electrolysis could render to the isolator of elements; and the adoption of this method by Sir Humphry Davy for the analysis of the hydrates of the metals of the alkalis and alkaline earths, and the results which he thus achieved, established its potency.
In 1800, and Rumford himself selected Sir Humphry Davy as scientific lecturer there.
In 1806 Sir Humphry Davy proved that the formation of acid and alkali when water was electrolysed was due to saline impurities in the water.
He was elected interim president in June 1820, on the death of Sir Joseph Banks; but he did not care to enter into competition with Sir Humphry Davy, and the latter was elected president at the anniversary meeting in November 1820.
C. Oersted (1777-1851) had shown that a magnetic needle is deflected by an electric current, he attempted, in the laboratory of the Royal Institution in the presence of Humphry Davy, to convert that deflection into a continuous rotation, and also to obtain the reciprocal effect of a current rotating round a magnet.
He married in 1904 Janet Penrose, elder daughter of Mrs. Humphry Ward.
CALCIUM [[[symbol]] Ca, atomic weight 40.0 (0= 16)], a metallic chemical element, so named by Sir Humphry Davy from its occurrence in chalk (Latin calx).
This view was questioned in the 18th century, and in 1808 Sir Humphry Davy (Phil.
HUMPHRY DITTON (1675-1715), English mathematician, was born at Salisbury on the 29th of May 1675.
To Sir Humphry Davy belongs the merit of isolating this element from potash, which itself had previously been considered an element.
Humphry (1815-1886), vicar of St Martin-in-the-Fields, London; the Rev. Benjamin Hall Kennedy, canon of Ely; William Lee (1815-1883), archdeacon of Dublin, and professor of ecclesiastical history in the university; J.
In 1812 Mr Dance, a customer of his master, took him to hear four lectures by Sir Humphry Davy.
Sir Humphry Davy described him as a "very coarse experimenter," who "almost always found the results he required, trusting to his head rather than his hands."
In 1808 Sir Humphry Davy, fresh from the electrolytic isolation of potassium and sodium, attempted to decompose alumina by heating it with potash in a platinum crucible and submitting the mixture to a current of electricity; in 1809, with a more powerful battery, he raised iron wire to a red heat in contact with alumina, and obtained distinct evidence of the production of an iron-aluminium alloy.
Experiments on the combustion of diamond were made by Smithson Tennant (1797) and Sir Humphry Davy (1816), with the object of proving that it is pure carbon; they showed that burnt in oxygen it yields exactly the same amount of carbon dioxide as that produced by burning the same weight of carbon.
About this time Gay-Lussac's work, although he by no means entirely abandoned physical questions, became of a more chemical character; and in three instances it brought him into direct rivalry with Sir Humphry Davy.
SIR HUMPHRY DAVY, Bart.
Dr John Davy, Memoirs of Sir Humphry Davy (1836); Collected Works (with shorter memoir, 1839); Fragmentary Remains, Literary and Scientific (1858).
Thorpe, Humphry Davy, Poet and Philosopher (1896).
In 1812 he was appointed professor of chemistry to the Apothecaries' Society, and delivered a course of lectures before the Board of Agriculture in place of Sir Humphry Davy, whom in the following year he succeeded in the chair of chemistry at the Royal Institution, London.
Todd (1789-1840), Sir Humphry Davy (id.