The Wonder Island Boys: Exploring the Island

ion to the events of the day. All previous experiences were insignificant now i

possibly inhabited by white or civilized people. It is likely that people from those islands may visit this place at

s? They, no doubt, used the boat, as the oars and rope showed. But

o," was Harry's conclusion. "

il in it the next day if

nd out something more about it, and how it came to be there. If it had occurred to me that we should lose it so

Let us make another boat, and with that we can

in the event we should be attacked by savages, and it will a

y unsatisfactory, and somewhat cramped, and the Professor thought it

sed by the condition of the kitchen. We are apt to ov

st way to clean

by a liberal use of hot water and soap, to remove many of

which could be use

n wood charcoal has the capacity of purifying

does charco

sorb an enormous quantity of gases, and when so absorbed it condenses them,

out the imp

spoonfuls of charcoal will purify a pint of the foulest sewage; it wil

hing else tha

make a liquid of it, and then pour this over common salt we are making what is known as muriatic acid. The vapor of this acid will destroy all germs. The objection to this, however, is, that it has an odor which is worse than the impure or unhealthful gases. In

sed for bleach

equal. It will decompose every gaseous compound and evil-smell

reparations for, and after they had gone over the sanitary features of their kitchen, he was anxious to make

r have we found any rubber lying around, so we can make cells out

me of these iro

ng, with sulphuric acid in them. We shou

mean by non

rial which will not all

se clay? Will that c

ful what a friend common clay has been t

to erect a monumen

o do, because at the end we ar

should have to grind up the coke and t

r carbon or copper for

the othe

I wanted the zinc for, which

ositive and negative

no darkness without light; no heat without cold; no strength without weakness, and no jo

he current flows only

nerated and sent over the wires, the natural current flows in both d

rstand what yo

urrent flows from the positive to the negative, and the next instant it flow

we are going to make will

s, within the battery it moves from the positive plate, the zinc, to the copper plate, o

oes it

gure 25), you will see that the clay cell, which we are to make, has in it the two electrodes, A and B. That is what they are called when they are spoken of t

Primary

ution would also answer the purpose. The two electrodes are separated, and a wire connects the two outside of the cell. Now you will notice that within the cell the current fl

t from the battery will always go fr

u must not confound the terms 'negative plate' with 'negative pole.' All currents leave the battery o

that is a curiou

sitive or negative in the alternating current, so t

work, as in everything else, a certain amount of preparation was necessary. They had no screws, and no facilities for

will be a big job to beat out wire long enough for our p

ust draw s

m wh

the co

better th

ugh a copper wire more easily than through iron, and second, for the reason that co

hrough different substances

tards the amoun

er, that there might be a large or small quantity of water, or a great

e orifice may be large or it may be small. The amount or quantity which flows out is dependent on the size of the opening. Electricity is measured in a somewhat similar manner. What is called 'Volts' is the same as the force in the tank-that is, voltage means t

stand the dif

f copper, each having been beaten out to form pieces about ten inches long and a half inch thick. A steel plate about three-eighths of an inch thick, two inches wide, and six inches lo

mplate for

through, so that the bar was formed the size and shape of the first hole, and of course the bar was lengthened. The end was then hammered out so that it would go through the next

sumed in fully drawing out each bar. In this w

get so hot when we pu

rubbing together two substa

nt of the

e making the heat in drawing

cold iron it will get hot. There is not

of tiny particles, called atoms, and molecules. When you strike a piece of iron you force the

ue of all s

es

ed together will it h

d, move among each other with such rapidity, under compression, that the h

'molecules' a moment ago. What

ises only one substance. A molecule has two or more substances in its make-up. For instance, water is composed of two parts of hydro

fe and fork, which he had learned to handle most intelligently. In the various trips which had been made from time to time, the B

climbing Baby was in his glory. He would swing from branch to branch, and shake the nuts, and the amusing thing was to see him help gather and throw the nut

but knowing, in a general way, that eggs and milk were the principal things used in puddings, it was not long before he was regarded as the chef. Baby was sure to be present whenever George occ

ral nests of eggs. They are just as much more delicious than the common egg as the prairie chicken is more delicate than the hen. Baby never thereafter forgot the eggs. Singularly, he never ate any of them.

, and August was the month, so in concert with Harry, planned to treat the Professor with a bi

uld be sixty-five years ol

don't know when we get t

w, either. But what difference

e they couldn't put that many candles on the big cake, and the boys knew, from ex

his surprise. The Professor did not press the matter. As usual, when at home, he was shut up in what they called the lab

n set ready for the symbolic cake pyramid of little cakes, George ordered the gong to sound, and Harry made such a frightful din with the

aken my cakes?" he cried. "There are less than a dozen left." Baby chattered in the loft. The Professor could not understand the

is all this? Ex

is a birt

aid the professor. 'Yes, a

I suppose you have inv

nvited all we k

hat strongly affected them, and when the Professor, his heart so full that he could not speak, silently looked at them, they forgot the feast,

return of the day, and George, though not so demonstrative, joined Harry in this wish and prayer. Just then one of Geor

in his hand, and gravely took his place at the table. What a very narrow margin there

sufficient to start them up anew. And here a surprising thing occurred. As before stated, he never had been known to laugh. But now Baby l

umes have been known to carry through the air for ten miles. The odor from the balsam-yielding Humeriads has been perceived at a distance of four miles from the shores of South America; a species of Tet

y n

he oxygen of the air d

like a perfume, it goes a long way and does not need a purifying agent; but the ha