feature of the discovery is the opportunity it gives
for other hands to help; and the work of these hands will add many
new words to the dictionaries, many new facts to science, and, in
the years long ahead of us, fill many more volumes than there are
paragraphs in this brief and imperfect account.
THE ROeNTGEN RAYS IN AMERICA.
BY CLEVELAND MOFFETT.
At the top of the great Sloane laboratory of Yale University, in an
experimenting room lined with curious apparatus, I found Professor
Arthur W. Wright experimenting with the wonderful Roentgen rays.
Professor Wright, a small, low-voiced man, of modest manner,
has achieved, in his experiments in photographing through solid
substances, some of the most interesting and remarkable results thus
far attained in this country. His success is, no doubt, largely due
to the fact that for years he had been experimenting constantly
with vacuum tubes similar to the Crookes tubes used in producing the
cathode rays.
When I arrived, Professor Wright was at work with a Crookes tube,
nearly spherical in shape, and about five inches in diameter--the one
with which he has taken all his shadow pictures. His best results have
been obtained with long exposures--an hour or an hour and a half--and
he regards it as of the first importance that the objects through
which the Roentgen rays are to be projected be placed as near as
possible to the sensitized plate.
It is from a failure to observe this precaution that so many of the
shadow pictures show blurred outlines. It is with these pictures as
with a shadow of the hand thrown on the wall--the nearer the hand
is to the wall, the more distinct becomes the shadow; and this
consideration makes Professor Wright doubt whether it will be
possible, with the present facilities, to get clearly cut shadow
images of very thick objects, or in cases where the pictures are
taken through a thick board or other obstacle. The Roentgen rays will
doubtless traverse the board, and shadows will be formed upon the
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]
USA Japonia obraz obraz obraz English Walsh slowo S Antoni BakNorman 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]