ON THE THIRD FINGER, WITH FAINT OUTLINES OF THE FLESH.
From a photograph taken by Mr. P. Spies, director of the "Urania,"
Berlin.]
[Illustration: THE PHYSICAL INSTITUTE, UNIVERSITY OF
WUeRZBURG, WHERE PROFESSOR ROeNTGEN HAS HIS RESIDENCE, DELIVERS HIS
LECTURES, AND CONDUCTS HIS EXPERIMENTS.
From a photograph by G. Glock, Wuerzburg.]
The Roentgen rays are certain invisible rays resembling, in many
respects, rays of light, which are set free when a high pressure
electric current is discharged through a vacuum tube. A vacuum tube
is a glass tube from which all the air, down to one-millionth of an
atmosphere, has been exhausted after the insertion of a platinum
wire in either end of the tube for connection with the two poles of
a battery or induction coil. When the discharge is sent through
the tube, there proceeds from the anode--that is, the wire which is
connected with the positive pole of the battery--certain bands of
light, varying in color with the color of the glass. But these are
insignificant in comparison with the brilliant glow which shoots
from the cathode, or negative wire. This glow excites brilliant
phosphorescence in glass and many substances, and these "cathode
rays," as they are called, were observed and studied by Hertz; and
more deeply by his assistant, Professor Lenard, Lenard having, in
1894, reported that the cathode rays would penetrate thin films of
aluminium, wood, and other substances and produce photographic results
beyond. It was left, however, for Professor Roentgen to discover that
during the discharge another kind of rays are set free, which differ
greatly from those described by Lenard as cathode rays The most marked
difference between the two is the fact that Roentgen rays are not
deflected by a magnet, indicating a very essential difference, while
their range and penetrative power are incomparably greater. In fact,
all those qualities which have lent a sensational character to the
discovery of Roentgen's rays were mainly absent from these of Le
Notka biograficzna
Robert Laurence Bob Barr, Jr.[5] (born November 5, 1948) is the Libertarian Party nominee for President of the United States in the 2008 election.[6] He is a former federal prosecutor and a former member of the United States House of Representatives.[7] He represented Georgias 7th congressional district as a Republican from 1995 to 2003.[7][8]
Lektura dla każdego Piękne reprodukcje - wiele motywów! Korzystna budowa mieszkania juz w niskich cenach. Eugieniusz Eibisch Jacek MalczewkiNorman De Mattos Bentwich OBE MC (28 February 1883-8 April 1971) was a British barrister and legal academic who served as Legal Secretary and the first Attorney-General of Mandatory Palestine from 1918 to 1929. He was also President of the Jewish Historical Society. He was the eldest son of Herbert Bentwich.
Jack London (12 January 1876 22 November 1916)[1][2][3][4] was an American author who wrote The Call of the Wild and other books. A pioneer in the then-burgeoning world of commercial magazine fiction, he was one of the first Americans to make a lucrative career exclusively from writing.[5]