New-York tribune., 1873-01-17
A sB CO Eb E C n
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Tie above diagram represents the three sliecuaof
the blast al the important periods and Is copy OF
that shown on the screen
Then in second the first spectrum appears. as u
from the converter at first MI Eohsn SAYS tnat
these lines disappeared IN inverse order a. they ap
peared aud when last green line appears. the blast
should be shut off and the metal boiled. am tod tnat
English steel makers are not usug the spectre
scope the process II being used In Aus
constantly, and with the beet results. We DO not
know what these lines are due 70 altogether The iane
of the converter is an exceedingly important study.
What have already learned certain PROOF that
changes taking place there tbs process however, IL
capable yielding good results. But certainly seems
ride over The rails to the speotroscope. enabling the
Bessemer metal 20 he made uniform, and thus trust
worthy.
There is one other application which I will mention
here aud with which will close, Whenever we place
in the path Of the luminous ray OF white light certain
objects we certain effects and call them colors.
If we place between our eye aud tine sun something
which ntereepts all but the red portion Of the ray, we
call il red In other words, have transparent media
which all but portion OF the ray The speora
| which obtained are called in general ABSORPTION
specra II choose, we may place in the path OF the
ray varOus-cOored substances and show the ABSORPTION
singular faet that u we take various coored sun
stances such set OF dye stu two Of them exert
the same action upon light The ABSORPTION spectrum Is
| as distinct as the autograph rs a metal
Now as TO the applications which may be made Of this
fact In the first place 10 dye stus 1t is very Import
We may distinguish one from another by It's spec
trum and detect adulteratons In wine see that we
detect any changes. Nr sorhy got coOrfng mat
VI
this be dissolved in little citr1c acd, solution
the color of which cannot be distinguished from the
spectrum OF fresh port. IL add little more acid, we
notice further oxidation, and then il resembles the
spectrum OF port about ten years old. adding more,
becomes that OF port which older there being
tain colorng matter which changes in It's character by
| oxidation
In regard 10 the adulteration ef wines Mr.. sorby
believed that the cOlOred wines adutcrated Ny
observation, however, in regard to various cOored
wines given results at variance with this belief. The
| spectrum gwen by a sample OF wine was in case
identical in character with that given There
some for the popular belief as 10 the Of
Brazilian wood and the common Virgiulau poke. The
spectrum In the OgwOOd different from that
gwen by the Wits purple AdulteratOn is confined
| 70 wines.
There are other and numerous examples perhaps or
vital Importance 10 where We lind upon nvesti
cation aduteration carried For instance ii IL found
that mustered almost uniformly adulterated with
turmuIie. Rhnbdrb was almost always found 10 be
aduliefated. There Is KIND OF cheese bought in the
English markets which has curious yellow color which
when extracted proves To be anattO Butter been
found aduterated with the cooriug Inatter of
carrots but whether through the medium OF the
otherwise we cannot say.
CoLoRING MATTER OF HUMAN BLOOD.
come 10 another substance where there Is a cooring
matter which is essential to very existence namely
2he coloring matter OF the human blood and which
gives us exceedingly interesting spectrum. Prof
Stokes the first to apply the spectroscppe this
field OF investigation The various kinds OF blood show
different absorptive spectra. My assistant will throw
upon the screen diagram cohtang the spectr OF blood
in various states.