By a modification of the bridge method, applied with excellent results by Dr Muirhead to submarine work, condensers are substituted for a and b, one being also placed in the circuit between P and Q.
This is accomplished by Dr Muirhead in the following manner.
A very much simpler form of siphon recorder, constructed by Dr Muirhead, is now in general use.
Lodge, Muirhead and Robinson also devised a self-restoring coherer as follows: 3 - A small steel wheel with a sharp edge was kept rotating by clockwork so that its edge continually cut through a globule of mercury covered with paraffin oil.
At a later date a syntonic system comprising, as above stated, an antenna directly coupled to a resonant closed circuit was put into operation by Lodge and Muirhead, and much the same methods have been followed in the system known as the Telefunken system employed in Germany.
In the same way the arrangements finally elaborated by Lodge and Muirhead consisted of a direct coupled antenna and nearly closed condenser circuit, and a similar receiving circuit containing as a detector the steel wheel revolving on oily mercury which actuated a siphon recorder writing signals on paper tape.
In England, in addition to the Marconi Company, the Lodge-Muirhead Syndicate was formed to operate the inventions of Sir Oliver Lodge and Dr Muirhead.
Muirhead, The Service of the State: Four Lectures on the Political Teaching of T.
Muirhead, Elements of Ethics (3rd ed., 1910).
Muirhead, Elements of Ethics (1892); J.
By Costelloe and Muirhead), on the other side, one can go a considerable way towards understanding the foundations of Aristotelianism.
Muirhead, Private Law of Rome, p. 73 et seq.
"ALEXANDER MUIRHEAD (1848-1920), British physicist, was born at Salton, E.
Attendance at a lecture on Hertzian waves given by Sir Oliver Lodge at the Royal Institution in 1894 resulted in the Lodge-Muirhead syntonic system (see 26.538), which anticipated Marconi.
The original idea was Lodge's but Muirhead supplied the practical science required to work it out.
Goodwin, Plato and the Older Academy (1876); Costelloe and Muirhead, Aristotle and the Earlier Peripatetics (1897); O.
*loge of James Watt, by James Muirhead (London, 1839); also translated, with notes, by Lord Brougham; Popular Lectures on Astronomy, by Walter Kelly and Rev. L.