The sun., 1900-08-12
NOTES or ELEcrRIcAL PROGRESS.

SOTES or ELETThCAL rhO6hHSS'
o"e o., 'ne "" nhhs Vi poS'"' na"'p",'n
WI y. i"u uuins .ie MS " ,,
..""s .. "'onae,' N'"nA" Wv" Nan' ..1' -
H, .N. .na chaiaN"a on -. 80 :, r.' 80. I,
"' y, '''s 'VnpHia''' s"o'' ST." v '1''- 80 =
~. "',"ns ."np a. ,, -. 1,.
.a-'n ""' '"e ''s' VI VI. W.. -, -
INV .aO'e s's'e,h "'n''""sns AZ 81 .,sa
,," ,nu " 80, =, =. 49, ,..,as,.no
mr. k,n,cb.,t.r .o.x, In communication with tn,
Russian Land lines .cr,as Siberia. In reality com
m.rci. necessity "a n,d,v nllinr the links necrSar,
IN establish communication ny WAY of Alaska III,
Al,u,,,n I,l.nds ana .I,n.n with the far Fast 81
IA, s IN. several schemes for the construction OF
transpacac cabl. in deep water with few landing g,
from Ca,o,n. n m. chinese coas, ar. concerned N,
n.ces,,tv for ,,cb line 4. more strategic than com
m.rsaI IA would cos, , vr,,, deal NOR. than lin,
oompo,ed Of many sbor, links along the Alaskan
co.,, the Al,u,i,n and KurI, Islands and japan
besides being NOR, =, p.nsye 10 maintain and really
more uabl, 70 interrlntion. C,bl. repsirs at grea
s.n,bx ar. v.rv cos,lv and IN. .arthou.ke-one OF
IN. mos, .n.mi., of ca HES 4, Al home in IN,
psrtoc In u.diuu I.t,,nd,s II now seems Mkely
that III. line nm ,e the OF the urge
need for unicstion will be completed before any
plan 70, copn,r,ng the Hawaiian Islands and Chins
Is put into effect
oeeh ae'iseu "hch No'ks oh an ehn'e'' new p""'
ope' III all eiee"io hsh' ana o"e' ihs''ha"ois
"s"'S' uo' VI 'he 'esis'e"ns Spe "Ae sa' "'e"''
ou' 'huea"fs mucn IKE me pressure sause oh
s"am oohef' are used 10 ihd'cae 'ne eonduoh o 'he
current ou'pu' As regards 'olume ana pressure ihese
na'e almost ih'anaoS "ofFeu OH >oHe pHnc'p'e
'h'o''hg 'ne masneuc euec'o OF 'ne cunenE an" nave
oeeh sehrtahy very dehca" ana complex IN consuuo'
uon as wen as expensive. for large shuohs' whefe
great volumes OF current are to he measured or wher
ever hlgh cctnca pressufes are used their use has
reason OF certain Inherent defects The new type OF
meter employs auxiliary power In the shape OF COM
pressed air 10 move column o, LIQUID In tube this
being the ysib bic indicator OF the tnstrum.nt while
the delicate magnetic parts are used only to regulate
the now OF the air small motor OF the size used TO
drive the ordinary electric fan Is used 10 work little
pump and compres. air 10 about three or four pounds
70 the sou,r. inch pressure This air sowS into A,
receiver connected with glass tube and reservoir
OF OIL so that the height Al which the oil stands in IN.
tube is a measure Of IN. n,,ssure of m. air F,om
this receiver IN. air ,scan,s through little safety
valve. to which are attached the delicate coils OF IN.
ins,rumen, Variations In the strength or pres,ure
OF the curr.n, measured as m. c,se may he c.uss
these coils 70 exrr, heavier or
pr,ssur. N, m. safety v,Iv. Witch is constantly
boning og H,nc. IN, variations of tho current n
n.a, a, co,,.snond,ns variations ~ m. s,, n,sssu,.
in IN. receive, and of IN. h.tgh, n, ,be column n, o
Az N, c,r.n, ,,e,sur.d h.s n,,c,Ic,,ly no VOW u
do merely u con,ro, N. v.,y. y,,v small cu,rsr,
variations can n. m "A. 70 show I.,o. chsns.. in
- -. ,-,,-,,-- ,--,--,,