The sun. [volume] (New York [N.Y.]) 1833-1916, 1899-08-20
NOTES ON SCIENCE AND 1xDusrnx.

onlV negative natal M .ph.,it,t. for th. l.tt.r
has vet been fopnd Tho ,msI,,no ~ ,,no 4. .,n.n.
.v. i.roo .r,orr, ~ oo.I na,n, ,,.n.u- .o,,,..a
IN ,moit a ,b,s bnino don. nv y.nor,,,no ~. 49,.
and then and thar. ara ,., ors. 40 vol,
an. Tho ~or,a. nroa,o,,on =, ,,,s ..m.r..h,.
ar,,c,s "a a. .hor, 400 600 tens 90 ,h o.
Of which this countrv ,roduca. oes ooo ION. ..ch
wear Ills ,iso sgur.d IN AZ ,onr,bs q, ,ho in
ara co,rss from ,ba M,.sonr,K.n..sAr..n...
heiu'' wnero 'no orc runs Ao""' oo percent mo'eho
ZINC, nv pio""'"oh 'n's 'cs' WILL IL " 'nouehs
reseh z'o.ooo TONS
Much interest 10 exhibited In the recent expert
ments made by Sir Norman Loohyer with q flexible
lm his idea being TO adapt Il to spectroscopic pho
Biography. The large concave Rowland grating
which he has In for his solar spectroscopc pho
tographs IL PIN feet radius and has some 20, 900
lines the inch ruled Its surface IL gives spec
trum so inches long The focal plane of this grating
10 of necessity considerably curved and IL IT, there
fore. impossible to get q sharp photograph of the
whole spectrum on Q glass plate; In fact, not more
than or 20 inches Of the spectrum can be brought
into focus on the same plats the difcu,ty in oues
ton being gotten over by using flexible flm which
10 bent to the curvature OF the held The point of
the photographs taken with this Rowland concaye
grating the longest solar spectrum photographed
'''''""'"' VIZ. oo 'Ne"o''
It seems that abroad the demand for tho nav
fuel astalhi as steam producer ia constantly On
the increase. As already explained Il In A product
OF the oil wells Of Baku n dark yfscous auid noN
more innammable than vegetable oil and less 90
than coal. nothing else nc burned on the raily.ys
in central Asia tho Caucasus and southern Russia.
the Black Sea- Caspian and river steamers and in
the innumersble industrial works now sprinpns
into existence on tho Azov iittoral In feeding fur
naces with astalk the principle In all cases In that Of
the Root blower. A current of steam or prefer.-
bly, air. carrying with Il the fuel In minute subdi.
vision Is forced ut high pressure through the nozzle
boiler to be heated the result 10 an intensely white
roaring Name and in pulyerizers OF the latest TYNE
the value OF the material az compared with coal az
Then too no foroo OF stokers In REQUIRED an tbat In
necessary in the largest steamer being a man to
regulate the supply by taps and there ia no smoke
litter or dust,
,
$3.50, ", Oh pa'en' oAoA
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- " INC y, 'ne ionA AHo. .naus.i'"i iActs
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