202 
wry anciently, since it has 
given the name to the country 
ami cities of Guatemala. The 
old city of that name near it. 
has often been destroyed by it, 
and the fire volcano of Alote- 
nango, which last eruption was 
in 1826. 
Let geologists explain what 
difference there is between this 
huge spring of water, and other 
periodical springs of smaller 
size. C S. R. 
152. Improvements m Naviga- 
tion . 
They are always very slow 
by the fo ee of habit and fear 
of in no v at i < > n . Let u s re m e ru - 
her how long it has taken from 
the introduction of rafts to 
that of steamboats. Even 
steamboats were invented three j 
centuries before they were 
adopted. But now the march 
of improvement is more rapid. 
It is how requisite to build 
^steamboats that will he incom- 
bustible and can never catch 
fire, 2d, that may never sink 
even when striking against 
snags, rocks, &c. 3d, that 
never will burst their boilers. 
All these 3 requisites, which 
everyone should think indis- 
pen sable to secure lives and 
property, are either known or 
in a fair way to be di cove red 
ere long. But will the owners 
and builders of these boats 
adopt such improvements? Per- 
haps not, they are intent only 
on speed, and insuring do not 
care for wanton losses of lives ! 
But the public must call for 
and demand these safe improve* 
meats, by neglecting those who 
sport with life. 
Yes, let it be known that I 
and others know how to pre- 
vent any boat from ever sink- 
ing, and from burningor catch- 
ing fire, and I am ready to 
impart the information or sell 
the articles required for the 
purpose. 
(J. S, 
CHEMICAL MAWUPACTimE, 
OF PROFESSOR RJIFINESQWE. 
J have added to the articles which 1 manufacture the following two. 
4 . ANTIGNIS. 
Or Incombustible Tarnish, and Paint of any required color, to 
prevent houses and ships from catching fire and burning. 
Any quantity supplied by contract at one dollar the 
pound, in solid cakes.— Apply by letter postpaid. 
2. SYRUP OF CREAM, 
To supply milk and cream to sailors, mariners, travellers, 
and in Foreign Countries where no milk is to be had, by dilu- 
ting with water it becomes sweetened milk, requiring no sugar 
with coffee and tea. Any quantity supplied by contract at 
one dollar the bottle. Orders thankfully received at J8& $$ 
iijorth Eighth Street, Philadelphia- 
