The San Francisco call., 1910-05-09
Answers to Queries

TELEPHoNE-A. W, Mount Bullion When
was the principle of the telephone discovered.
when did it come into practical use and when
was the long distance phone introduced?
The principle was demonstrated by
Robert Hook in 1867, but no practi-
cal application of the discovery was
made until 1921, when Professor
Wheatstone exhibited his enchanted
Tyre, in which the sounds of music
box were conveyed from cellar to
an upper room. In 1891 Johann Phillip
Refs, a German professor at Friedrichs-
dorf, exhibited a telephone at Frank
furt. 1t had the essentials of the mod
ern phone, but he could not interest
any one in its commercial value. Prof.
A. G. Bell secured a patent for the
modern instrument in February. 1877,
and in the latter part of 1873 expert
ments for the long distance telephone
were made.
TO COLOR METALs-L.. city. What is the
process for coloring metals?
The coloring is produced with So
luton in the proportion of ounces
of hyposulphite of soda and y pints
of water, to which has been added
solution of l ounce of acetate of lead
in the same quantity Of water Ar
ticles to be coIored are placed in the
mixture, which is then gradually
heated to neaT the boiling point. The
effect of this Nsolution is to give iron
the effect of steel blue, zinc becomes
bronze and copper or brass becomes
successfully yellowish red, scarlet,
deep blue, blush white and finally
white with tinge of rose
ROSE JAR-AI. V B.. Camp Meeker. How
are rose leaves preserved for jar or
scent bag?
Sun dry quantity of Black Prince,
Pauline or other fragrant roses. Place
them in jar, add some cloves and
cinnamon and a little alcohol, Just
enough to moisten the leaves; then
place the jar for a time in the sun,
where it may become warm, but not
hot. The cover must be kept on while
the jar is in the sun. After that when
the cover is removed most delightful
fragrance is emitted from the jar.
GoLD-B. F.. City. Is Cuba mineral coun-
try; that is, have gold and silver been found
there?
Gold and silver have been found on
the island. Traces of auriferous sand
have been found in the Holguin and
the Essamby rivers and specimens of
fine gold have been discovered in Agu-
lam and Sagua la Grande. Silver and
copper have been found in Villa Cara,
the product of silver being about seven
ounces TO the QulnJal- 1neFe are rich
copper mines II miles from Santiago
de Cuba.
DOG Subscriber. City If l find a stray dog.
advertise for the owner, but no one comes to
claim him within certain length of time have
right to claim the dog nay own?
In California one who finds personal
property of less than $40 in value
should take steps to find the owner but
if unable to do So he need not turn the
property over to the county authorities
The law fixes the value of a dog at 81
TALLEsT-A. N. B.. Cayueos. Where is the
tallest building in the world:
If by building you mean structure
that is habitable from ground floor to
top story, it is located in New York
city-the Metropolitan life insurance
building, 700 feet inches.
PITCH-S. NJ, Fort Bragg How NAV mitch
stains be removed from a voiIe skirt?
BY soaking in pure alcohol for a few
minutes and then rubbing with a clean
sponge dipped in the same kind of
liquid.
THE ARMY-A. N. B.. oayucos. How many
soldiers are there in the United States army?
The total enlisted strength, staff and
line, is 1882.
RECEIvED-R. L. A.. City. Is the use of
Were received this, date" proper?
Yes.