The age-herald., 1901-09-12
Radsum Most ValUa6le ef Metals
 And Is Lzght Gtvtng PrQber1

If candle were placed four feet in front
 of ooneave mirror two feet in diameter
 and allowed to shine on it for F seconds, 1-67, 75e, ,O0o of the heat generated would de- fleet the measuring apparatus 1-4090 of a
 foot
 Radium will measure the heat of can
 d1e 76,OOO miles away. Prof. Nichols has
 measured the heat of several stars with
 1t,
 The instrument consists of two small discs of mica suspended by spun glass
 threads from the two ends of a glass
 beam, The glass beam is adjusted to
 move on pivot Both discs of mica are
 covered with lainpblack. One is protect
 ed from light, the other is exposed The
 whole apparatus is enclosed in vacuum. Inside the vacuum Is placed a little bit ] of radium salt. st Is The radium gives out its light and the
 heat which it generates causes an expan-
 sion of the air in front of the exposed 1 disc A vacuum, of course, holds the
 smallest imaginable amount of air. Ka-
 dlun pi oduces an intinitesimal amount of
 heat. Yet 50 nicely does tho machine
 work that it's deflection can be iIlelsurod 1 thus giving the amount of heat in raci-
 um light, Only one firm of chemists in New York
 City manufacture radium. They. usually
 keep four or five vials of the salt on
 hand. The vials are about one inch long.
 as big as a lead pencil and each is about
 one-sixth filled. The radium salt in these
 bottles is worth s5 a gram. It is white
 and faintly luminous.
 Hold a nartiele of the salt before the | eyes and an impression of light is reeeiv- ed Yet, if a piece of the salt the size of
 pea were hidden behind a plate of iron
 it would cloud 0 photograph plate on the | other side or give the faint outlines of q | picture
 | The New York firm obtains its radium | from the "taiiings'' of Western gold ere. The gold is extracted, and the refuse
 contains a good deal of uranium. The
 uranium contains varium, among other
 things, and the varium locks up the ra- dum. Lots of the refuse amounting to about 1G0,001 pounds and practically val
 ueloss, are treated for radium. The pro- cess is an intricate chemical work, re- auires about 100 tests and reactions, and takes three months time. ~as Radium is found in largest quantities so far in pitch blende, which Is an oxide
 of uranium. Mme. Curie, the French wo-
 man physicist, is the only experimepter so far to separate radium absolutely from its compounds. She discovered the pro- cess two years ago,
 The first scientist to discover the sub stance without getting 1t in free quanti- ties was Prof. Henri Becquerel of Paris In 1896.
 Hsdium light Is of two kinds. One varie-
 ty of rays will not penetrate anything. The other variety will bore through any known substance. Both of these rays Proceed from the same bit of radium. 
 to the nation and to the world the Wifi
 liam Mckinley whom Ohians have known
 and loved and honored. No thought of self, but only for others-not alone for tho invalid wife, but even for the assassin
 who had laid him low. In these utterances
 we see the true William McKnley-not | Mckinley the soldier, not Mckinley the | statesman, but the man himself. By hls unselfish utterances in time when pre- meditation was impossible, the nation and
 the world will forever recognize in Mc- Kinley the true Christian and the gentle man.