Evening star., 1915-03-07

preston at arra; deu.hs. and She idca
of the reconlrrcs sion tank. have aloue
been worth the entire cost aud ii.ne ie-
quired for the exhaustive tess.
When all these ufa:tcrs had 70 n
tcs.ed and checked and rechecl.e'. 'c-
tual wori, ia Cacp water was he =
From the deck o tho destroyer Wffks.
rot1pletell nttcd Up FOR conductiu- so
practical tests. DIVERS enlisted tuc. "f
the many and some OF the ol'.@.,,'s .
them mselNes down into fhe ,y"-
ters of the sound. First - seventy 'its
feet. then to eighty. iiHctk, q i#3H-
urcd feet. these willing cNPerimcutets
descended. The depth gradual! NJ
creased uutil records of more thag 30
feet had hccn made.
Results uoted IN the 'aJo!aiory irs.s
we're con.,.aIcd with those in tuaL
decp-sea ~; ~ ORR. .ad at tNcrg dcp'h
the result ~ the ta,tl; divers eli -
q comp.e,c cGs i. on the results "r hs
actual div y.nG. Theory worked "Ei %
per:e c,'ol rn practice; the figures ~
ihe f;.tish admiralty, Supplemented ny
:hus. .,s Tie American :a% stiSa.urs.
were fossG % anny exactly to the enn-
ditio.s - :. tuaI iii, ing and tie pro- IN
uS i.o ;lo vi. eht 90 dow n {" antersd-
o. decps wr'irpu; c.,crs : lea 40
agir,.. CO.. aet,# ".iS 500 e.,
neu cl.!.t,e. Naie l'r,-llis ..sl ent
down ~ tve,. sri remained 81 Iilat
dc: a. 10 -s o;tN minutes. watkins aDoac
-, ti.e bottom o. Long island sound.
vince nr', ! hasuan being had Walked
b"torl .,.-.. He WAS brought up he
suffered rs, 't.e!% no Inconvenience ~
an, l:i,I. 5000 Gida't pour from u =
e@rs. nose and mouth: lie wasn't blind-
!IN u ,tf
and neither lad the pressure killed him
preilishal said. when he came UP. that
he could have gone much deeper u the
bottom of the sound hadn't been IN tho
way. and that he could have STAYED
twice as long if 1t had been nccessars-
Twenty minutes al "a feet beneath thu
surface of the ocean. however. "af
plenty of time aud plenty of depth :"
prove that the figures of the expert
menterS were correct
But what. the average reader VIII
ask. is the practical value of such cN-
periments. even when theory has been
proved by actual practical tests
A few years ago a submarine in the
French, navy, sank In the harhor AZ
Marseille. with all on board. 4 year
ago another of the French submarines.
its machinery disabled. went to the
bottom. carrying its crew OF a dozen
men and officers with it Last spring
British submarine, in collision with
another vessel was sunk. In the lat
ter case II was known that for al
least a day or SO the men and officers
of the submarine We're a1ive-alive in
steel tomb at the bottom of the sea.
In any OF these cases diver. had he
been able to locate the sunken sub
marine. and had he been able to reach
the depth at which it rested on the
bottom. might have made possible the
salvage of the craft and. perhaps, the
rescue of the entomber men.
Not that he could have found any
way to enter the sunken vessel or make
repairs from the outside that would
have enabled it to come again to the
surface. Nor could the diver take the
craft, small as submarines are, under
his arm and carry il 10 the top.
But how comparatively easy it would
be for divcrs-provided they located the
wreck and were able. under the newly
discovered system. to work At such
depths attach hooks, chains and
cables to the little vessel, by means OF
which the powerful engines and
winches OF big shin on tho surface
could raise it to the top of the water
That the divers of the American navy
and the navy Of Great Britain as "cii
under the new system could DO JnS.
that thing is certainty. ENtcnsion or
the figures of the compression. De
compression and recompression tables
that have been worked out by Naval
Constructor Howard aud his co-worh
crs makes 1t certain that if a man can
descend to "A depth OF nearly a hundred
Yards he can go deeper. perform ms
work and be brought to the top again
alive.
The Navy Department. in summing Hp
the results of last falls tests. which
were carried out under extremely prac-
teal conditions. in smooth water as
we'll as in weather of the roughest.
says:
by these tests. carried "u' hy the
bureau of construction and REPAIRS
yreater j,nnroyementS should result IA
everything pertaining to diving COLI
nected with our navy. including pro
cedure methods of diving. diving hti-
NETS, diving dress and all apparatus
than all of the improvements oil the
last forty years combined.