The New York herald., 1875-10-22

ingenious experiments at the Alexandra Palace.
ana mucn was sMd OF raising the hull by
TO be a profound secret the public onlv being in
formed that a small model left the bed OF the tank
quickly rose by itself to the surface and instantly
sunk again. II was popularity thought that the lucky
genius who planned the experiment could embazon on
his shield Eureka But much OF what must un-
d0ubtedly be admitted TO DO theory cannot be
carried out in practice and in like il often hap
pens that the results obtained from working in linn
tied sphere OF action incapable of producing like
similar results IN more extended and wider sphere
Those who talk Of achieving the object by natural
laws should first set with duly consider
ing the analogy existing between experiment
IN miniature and vast undertaking at very consid
cradle depth by the agency first the inventor
seems 20 have entirely ignored tho question Of what
lifting will be requisite get rid Of the suction
around the hull and binding, as were this enormous
mass OF iron, some 500 tons dead weight, TO the
sanded bottom which II rests. Here to begin with,
there Is utter want Of similarity between the minia
ture toy model and the Vanguard she now es-thcre
IS no suction in the case and enormous earth
attraction in the other.
MINIATURES EXPERIMENTS
Again, the idea OF raising miniature ships in tanks
To the surface is a very old one and has frequently
been performed In the Polytechnic Institution In Lon
don, and elsewhere II is undenably true that com
pressed driven from above into the hull Of sunken
model, of vessel Of moderate size will cause
her 70 float II IS also that large vessels Of
siderable burden, laden with pig iron stones &C. have
beon raised successfully by balloons, filled with hydro
gen, generated by suphurc acid and zinc and IL is also
true that great experiment on the same principle
with which the writer was connected some few years
since in the Mersey, failed after outlay Of thou
sands OF pounds sterling Yet the principle sound
ever, and has since raised several ships but the
difficulty experienced in the River Mersey, with the
steamship Brother Jonathan was no doubt, the very
same that will be found in the Of the Vanguard
viz, that the hull OF the steamer filled by the tide
full OF mud and in the Of the Vanguard will be
found full OF sand II such be the the idea of in
naton Is out OIL the question. And, in any case the
operations must be abandoned until spring the
commencement of summer.
THE WATERFRONT COMPARTMENT
vi course II must be admitted that IL the doors of the
bukheads of the water-tght compartments the Van
guard could be made stanch, and then the water
PEELED by the forcing in OF hydrogen gas air sent
low high pressure from above the ship would
right herself and Immediately up and even If the
water-tght compartments were insufficient TO float
her. the broken portion Of the vessel could be
nlled with cases containing a buoyant element;
but this is only working suppositon. If the
water-tight compartments, those which
had the doors shut after the collision, remained
intact from the water, the ship would very probably
not have sunk. And with regard to those doors left
unfortunately open, what divers going TO close
them in l27 feet Of water ? And some were even
sworn TO- at the court martial as being impossible to
close in consequence OF being jammed up with coal;
so that these cannot be made available The gentle
man whose name has recently been so prominent be-
fore the public in connection with the raising OF the
ill-iaed ship IS well known 70 possess original genius
and great ability, and Admiral Elliott commander
inchief of the neet has asked Mr. Dillon proceed
to Portsmouth, in order to test his principle the
hull Of the lrgate oberon, sunk by torpedo. The
Ooeron l believe, lies in comparatively shallow
water on hard bottom, and there should be little
difficulty in lifting her by hundred well known sys
TENS, whether it air gas pumps anything else
But may be fairly ackno wledged that the Vanguard
VIII probably lie where she is AZ present for many
year TO come
SUBMARINE LAMP EXPERIMENTS
Yesterday evening the experiments IN connection
with the submarine lamp were continued On this
occasion. however, the diver and lamp sup
piled with air from OF the Denayrouze lever pumps
The water less clear than on Monday evening"
nevertheless the lamp having been lighted at thirty
SIX feet depth, burned brilliantly in the sight Of all
around the wharf and board the steamer Mr.
Applegarth then sent down the speaking tube
interrogatory to the diver (laloran what he
about by coming up, when the latter said that he
waiting for cigar. This speedily got and
Halloran having up the ladder fixed TO the side
OF the Carron tug, the front shield of his helmet
removed and the gnted cigar placed in his mouth and
then the glass screwed again. He then again de-
scended, and on being asked from above how he
getting replied, most beautifully. | reading
and smoking" After the lapse of considerable
period Haoran asked TO speak with the cigar
in his mouth to Commander Bait K. N, and he said
that ''he doing first Glass; Mr.. Applegarth
then told him that Captain St Leger the
harbor master, wanted to speak TO him Haloran
piled, ~ wish had him here' to which the gallant
captain replied ''Thank youn After a series of most
interesting experiments which showed the complete
control the diver had over the submarine lamp, he
was drawn up amidst cheers from the large assembly
congregated the Victoria jetty, who greatly
interested with the evenings proceedings and which,
under Mr.. Appegarths management were brilliant"
success.