Hypophosphorous acid, HP(OH) 2, discovered by Dulong in 1816, and obtained crystalline by Thomson in 1874 (Ber., 7, P. 994), is prepared in the form of its barium salt by warming phosphorus with baryta water, removing the excess of baryta by carbon dioxide, and crystallizing the filtrate.
Mr Basil Thomson (who after Baker's deportation had carried out reforms which the natives, when left alone, were incapable of maintaining) was sent in 1900 to conclude the treaty by which the king placed his kingdom under British protection.
THOMAS THOMSON (1773-1852), Scottish chemist, was born at Crieff, Perthshire, on the 12th of April 1773.
David Thomson with a small company from Plymouth, England, in the spring or early summer of 1623 built and fortified a house at Little Harbor (now Odiorne's Point in the township of Rye) as a fishing and trading station.
It was first seen, from a distance, by the missionary Ludwig Krapf in 1849; approached from the west by Joseph Thomson in 1883; partially ascended by Count S.
John Thomson of Greenock (1782-1855) made an independent calculation of logarithms of numbers up to 120,000 to 12 places of decimals, and his table has been used to verify the errata already found in Vlacq and Briggs by Lefort (see Monthly Not.
By applying the first law of thermodynamics, Kohlrausch deduces that a quantity of heat, CBdT, is absorbed in the element dT per second by the current C. He wrongly identifies this with the Thomson effect, by omitting to allow for the heat carried.
The potential diagrams already given have been drawn on this assumption, that the Thomson effect is not really due to convection of heat by the current, but is the measure of an E.M.F.
The potential difference, due to the Volta effect in air, has been shown by Thomson (Lord Kelvin) and his pupils to be of the same order of magnitude, if not absolutely the same, as that produced in a dilute electrolyte in which two metallically connected plates (e.g.
If the current flows from A to B there will be heat absorbed in AC and evolved in CB by the Thomson effect, if the specific heat of electricity in AB is positive as in copper.