The Ogden standard. [volume] (Ogden City, Utah) 1902-1910, 1909-08-27
SCIENCE NOTES

~ me means Of a new piece of ap-
npr1tps dcslxned principally for the
plumbers use O great deal or trench dtE-
riug nay be avoided. II Is called a pip+-
forcing jack, aDd by digging dltch long
erourh 20 take the jack and start inc
orst length or pipe II Is possible 10 Lay
almost any length or service pipe ibis
means that the jack VIII save inc OTi
the expense Incurred In digging the trench
and rcnnlng ii when laying service or
pSns nnca. The Jack Is capable Of driV-
tng pipo up 10 four-inch diameter, and
rs great n length as 80 feet OF 2hinch
tioe has been forced through the ground
by IT
Spraying is the method followed at the
present time By the government m de-
sroying the wutcr hyncluth which has
proved a serious lmpediulent TO nnTigs-
lion on many OF the Southern rivers Of
mis- country. A creat number Of suggcS-
lions have been tried, and the spraying
proccss hos BEEN found TO be tho most
cnectunl and economical
Two government boats are engaged In
tho work Each Is equipped With tnnkB
for the boiling OF q mixture Of white
arsenic sol soda and Dnter. IhE 10
sprayed on the plants, and as the latter
arc nbout 9S per cent. water, there Is
under the action OF the poisonous solH-
tiou Thot the solution kills the pinnu
absolutely has been proved ip every coHe
where the conditions were such o. 10 pre-
vent the Introduction Of new pinRts with
10 the urea sprayed
powerful autobiography plant hns
been contracted for by the Navy Depart
ment This plant will b. located NJ Wash
ington. D. c. aud viii be goanutsed TO
transmit messages 5000 miles across seaA
The aerial Transmission system WILL oe
supported by GDofoct steel tower, Ibe
nIaut h guaranteed 10 be Operative uouee
All atmospheric conditions and to be proof
ncaipSt all interference from all present
r1diotclegrapblc apparatus In use any
where. II Is reported thnt the Navy
opentors unsuccessfully tried for four
dnys no Interfere with the operation Of a
preliminary arrangement OF the type OF
npparatus to be used. The cost OF the
plant Is stated Us $4,000.
In the cource OF the coroner's Inquest on
tbr fntol explosion Of gas 10 Grange road.
Eernondscv, some Interesting testimony
eoncernlur the resistance OF concrete was
Given nv sir Alexander Binuie aud forc-
man iu the employ Of the South Metro
polItan Gas Company, sSys the builucr'
OF London. IL appears That thc gas PlPo
nrlmarlly responsible for the cKploslou
was OF the kind known as rider
connecting two parallel mains on each
side Of the road Under II was a enN,tg
feet deep by IS feet Wide. caused by
the escape from q broken water "h'n.
Tho cavity must have bean In existence
for "A considerable umc, for SIR Alc1Anuef
uinn,o found two hlsh-tide marks upon
us sidcs- The most extraordinary cir
cumstupce in connection with III" aaair
IA thnt the part Of Grange road Over The
cavity consisted Of nothing but thtn
layer OF concrete covered by Graoi'e
sette This apparently fran support had
borne the weight Of ordinary uauo anu
t,(-,o-aro,xn trAuacnrs without The least
indicatIon OF SSailure until footured by
the explosion thus anordmg most
atritdnr Illustration OF tbc v7nIn1ois Trop7
erties possessed by well -oSrtSe and th0F1
...aaacd concrete 4