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Kunzite
March, I9O5. ]
Notes a~zd Comments.
2I 5
If now an expression for the ioo per cent. initial q u a l i t y line of C, of the preceding Figs. 4, 5, 6 and 7, be obtained, which w o u l d give the v a l u e a at a n y given pressure, t h e n n for a limited r a n g e becomes known. It m a y be f u r t h e r said, upon c o m p a r i n g e x p o n e n t s for any g i v e n t e m p e r a t u r e , or a n y g i v e n pressure for the several vapors, or for a n y given r a n g e of pressure of the several vapors, it was f o u n d t h a t there was no direct r e l a t i o n s h i p between those values of n and latent, total, or specific heats.
M A G N E S I T E AS A L I N I N G F O R F I R E - B R I C K . Magnesite, calcined in an electric furnace, a n d used as a wash on the firebricks l i n i n g a m e l t i n g p o t in a calcium-carbide furnace, stood t h e heat for zoo hours w i t h o u t repair, whereas the bricks t h a t were u n p r o t e c t e d required repair after a five hours' heat.
KUNZITE. Kunzite, a variety of spodumene, found in California, is now cut and sold as a gem in sizes w e i g h i n g from I to 15o carats. I n color t h e r e is a variation almost white with a faint p i n k tone, t h r o u g h p i n k a n d lilac pink, into d a r k lilac. T h e g e m is r e m a r k a b l y brilliant, no m a t t e r w h a t t h e color. I t is usually perfect and free from flaws, and, w h e n pink, is one of t h e few natural stones of t h a t color. T h e price has varied from $6 to $2o per carat, a l t h o u g h generally it averages one-third the latter f i g u r e . - - E n g , and Min. your.
C A R N E G I E INSTITUTION W O R K . At the recent a n n u a l m e e t i n g in W a s h i n g t o n , D. C., of t h e Board of Trustees of t h e Carnegie Institution, a n n o u n c e m e n t was made t h a t during t h e year 114 grants, a g g r e g a t i n g $355,o7o, had been made to further researches in the several b r a n c h e s of science, a n d $i,ooo paid to each of twenty-four research assistants for specified scientific investigation. T h e larger projects undertaken by t h e Institute d u r i n g the year include: T h e establishment of a Department of E x p e r i m e n t a l Biology, with Stations at Cold S p r i n g Harbor, L. I., and at the Dry Tortugas, Fla.; of a D e p a r t m e n t of Economics and Sociology; a Bureau of Historical R e s e a r c h ; a D e p a r t m e n t of I n t e r n a t i o n a l Researches in Terrestrial Magnetism. SPECIAL STEELS. L. Guillet reports (ComlMes rendus, 19o4, C X X X I X , 540-542 ; Bulletin Soci~t6 d ' E n c o u r a g e m e n t , 19o4, CVI) t h a t in general the effect of molybden u m in steel is similar to t h a t of tungsten, but t h e same result is effected with a
Notes a~zd Comments.
2I 5
If now an expression for the ioo per cent. initial q u a l i t y line of C, of the preceding Figs. 4, 5, 6 and 7, be obtained, which w o u l d give the v a l u e a at a n y given pressure, t h e n n for a limited r a n g e becomes known. It m a y be f u r t h e r said, upon c o m p a r i n g e x p o n e n t s for any g i v e n t e m p e r a t u r e , or a n y g i v e n pressure for the several vapors, or for a n y given r a n g e of pressure of the several vapors, it was f o u n d t h a t there was no direct r e l a t i o n s h i p between those values of n and latent, total, or specific heats.
M A G N E S I T E AS A L I N I N G F O R F I R E - B R I C K . Magnesite, calcined in an electric furnace, a n d used as a wash on the firebricks l i n i n g a m e l t i n g p o t in a calcium-carbide furnace, stood t h e heat for zoo hours w i t h o u t repair, whereas the bricks t h a t were u n p r o t e c t e d required repair after a five hours' heat.
KUNZITE. Kunzite, a variety of spodumene, found in California, is now cut and sold as a gem in sizes w e i g h i n g from I to 15o carats. I n color t h e r e is a variation almost white with a faint p i n k tone, t h r o u g h p i n k a n d lilac pink, into d a r k lilac. T h e g e m is r e m a r k a b l y brilliant, no m a t t e r w h a t t h e color. I t is usually perfect and free from flaws, and, w h e n pink, is one of t h e few natural stones of t h a t color. T h e price has varied from $6 to $2o per carat, a l t h o u g h generally it averages one-third the latter f i g u r e . - - E n g , and Min. your.
C A R N E G I E INSTITUTION W O R K . At the recent a n n u a l m e e t i n g in W a s h i n g t o n , D. C., of t h e Board of Trustees of t h e Carnegie Institution, a n n o u n c e m e n t was made t h a t during t h e year 114 grants, a g g r e g a t i n g $355,o7o, had been made to further researches in the several b r a n c h e s of science, a n d $i,ooo paid to each of twenty-four research assistants for specified scientific investigation. T h e larger projects undertaken by t h e Institute d u r i n g the year include: T h e establishment of a Department of E x p e r i m e n t a l Biology, with Stations at Cold S p r i n g Harbor, L. I., and at the Dry Tortugas, Fla.; of a D e p a r t m e n t of Economics and Sociology; a Bureau of Historical R e s e a r c h ; a D e p a r t m e n t of I n t e r n a t i o n a l Researches in Terrestrial Magnetism. SPECIAL STEELS. L. Guillet reports (ComlMes rendus, 19o4, C X X X I X , 540-542 ; Bulletin Soci~t6 d ' E n c o u r a g e m e n t , 19o4, CVI) t h a t in general the effect of molybden u m in steel is similar to t h a t of tungsten, but t h e same result is effected with a