Presto

June 20, 1025.
PRESTO
22
zincate, or where free rinsing is not essential, of
sodium silicate. The former material regulates the
alkalinity to a point which will not attack zinc, and
also cuts down the tendency of zinc to oxidize; the
In Excellent Article in Trade Journal R. W. latter forms a layer of insoluble silicate of molecular
thickness over the clean surface as fast as it is ex-
Mitchell Summarizes Valuable Instruc-
posed,
protecting it from further action.
tion for Piano Trade.
"Sodiu maluminatc acts in a similar way with alu-
The care of the hardware used in the piano is the minum or its alloys. Copper, and similar metals, may
subject of an interesting article by R. W. Mitchell he protected against tarnish due to the combined
printed in the Metal Worker. Mr. Mitchell is con- action of heat and alkalinity, by the presence of small
nected with the department of chemistry of the amounts of certain resinates or gums, or of reducing
Massachusetts Institute of Technology and also con- agents.
sulting chemist of the Magnus Chemical Co.
"The proper degree of heat should be used to allow
Mr. Mitchell gives condensed instructions, the basic the foreign matter to break up most readily. As a
rule, increase in temperature makes oily dirt less vis-
principles to be in cleaning metals as follows:
"The foreign matter should be removed by physical cous, and by increasing pedesis (rapid oscillations of
means—emulsification in the case of oils, fats or suspended colloidal particles) of the colloidal material
waxes—or by lifting particles of solid dirt off into a present, speeds up its action in lifting off dirt par-
colloidal solution. The cleaning solution should be ticles. Often, too, heat, is valuable in expanding the
one which has the correct degree of alkalinity for the surface of the object and opening up the pores of the
best results with the particular oil in question, and metal. If a brittle or caked-on material is present, as
which contains the most efficient colloidal 'lifting dried on polishing compound, or a skin of burnt-on
agent* for the dirt particles. The first is accomplished oil. the unequal expansion of the metal and dirt layer,
by using a correct mixture of salts and alkalies; the of strong heating, will cause the latter to crack and
second is generally attained by a proper choice of become loosened, allowing the cleaner solution to get
in under it and push it off.
soap or similar colloidal material.
"Sometimes, however, heating is disadvantageous.
"The rinsibility of the solution is important. The
persistence of solutions in adhering in thin films to Certain animal or vegetable oils, if high in free fatty
an object, when rinsed with clean water, varies acids, will emulsify better in cold solution, as they be-
greatly with the nature of the solution, Olein soaps come pasty and sticky through partial saponification
are free rinsing; stearin soaps are not. Phosphates with warm alkaline solutions. Some kinds of dirt and
are easily rinsed; silicate solutions, on the other hand, certain lubricants coagulate and set when heated in
are completelyrinsed off only with great difficulty, the same way an egg does when boiled. Emulsions
and many changes of water. Obviously, even if a which are readily formed when cold will sometimes
cleaner is successful in breaking up and emulsifying break when heated. The convection currents of rapid
dirt off a surfact, it is a failure if the solution does boiling are a great aid to cleaning, but this is pri-
1
not rinse off completely. Also any trace of cleaner marily- mechanical and not thermal."
retained on the surface or in metal pores, will ulti-
mately lead to blistering, cracking or peeling, as the
DONATED RECORDS.
chemicals slowly act on the under side of the finish-
A
movement
in Columbus, Ohio, whereby six music
ing coat.
"The cleaning solution must have no effect on the stores have agreed to act as receivers for phonograph
material being cleaned. This is particularly impor- records which residents may wish to donate for use
tant in the case of soft metals, which are sensitive to by shut-ins at the Franklin County Infirmary, the
alkali, due to their amphoteric properties. In these tuberculosis sanitarium, is being commended by the
cases the degree of alkalinity must be carefully regu- charitable organizations and the newspapers. The
lated, and certain inhibiting substances should be stores co-operating in the movement are Goldsmith's,
present. The acti onof alkaline solutions on zinc (or Wurlitzer's, the Elite, Heaton's Music Store, C. C.
zinc alloys) is prevented by the presence of sodium Baker and the Music Box. Collection of these rec-
ords will continue for some time.
CLEANING PIANO METALS
HIGH GRADE
RED SEAL GENNETT LINE
Starr Piano Company, Richmond, Ind., An-
nounces Release of Red Seal Gennetts
Popularly Priced at Fifty Cents.
A new addition to the Gennett record line was an-
nounced by the Starr Piano Co., Richmond, Ind.,
through its Chicago branch at 234 S. Wabash avenue
early this week. Heretofore the Gennett line com-
prised only the green and blue seal, and priced from
seventy-five cents to a dollar, but the Richmond linn,
in complying with the demand for a quality record
at a reduced price, has added a new number which
will be known as the Red Seal Gennett. The price
of the Red Seal records has been set at fifty cents.
Manager Hunt, of the Chicago office of the Starr
Piano Company, in explaining the object of the new
records to a Presto reporter, said: "In order to meet
the present-day demands of the public for a quality
product at a lower price, we have produced an ideal
record which will be known as the Red Seal Gennett
and will sell at fifty cents.
"The latest hits last only for a period of two or
three weeks and then the record is laid aside and an-
other hit purchased. As a result the trend of record-
buying leans towards the lower-priced record, espe-
cially so with the song hits. To meet this condition
is the part of the Red Seal Gennetts which will be of
the same fine material that characterizes our blue and
green seal records. Dealers and the public have taken
to our Red Seal records in a most convincing fashion,
and it is evident that our sales will receive a great
boost."
SELLING PORTABLE PHONOGRAPHS.
The Orth Music Co., Milwaukee, is using window
displays to inaugurate the opening of the portable
phonograph season and called attention to the price
of the instruments. Responses to the displays are
good, according to A. V. Orth, president.
LIMA, O., FIRM INCORPORATES.
Incorporation of the Webb Phonograph and Radio
Co., Lima, O., with a capital stock of $10,000 has been
announced. Cloyd J. Brotherton, Edgar M. Webb,
Oren W. Webb, R. E. Webb and E. C. Hamilton are
the incorporators.
SLINGERLAND
Folding Organs
School Organs
May Bell
Practice Keyboards
Dealers' Attention Solicited
A. L. WHITE MFG. CO.
215 Kng4ewood Ave.. CHICAGO. ILL.
Slingerland Banjos
VIOLIN, CELLO AND DOUBLE
BASS WOUND STRINGS
OF SUPERIOR QUALITY
Guaranteed for thirty days after they are sold
SEND FOR CATALOG
S. SIMON
8106 Chappell Avenue,
CHICAGO, ILLS.
are sold the country over because
they are Highest quality and sold
at a reasonable price.
Over 40 Styles of Banjos, Banjo Mandolins, Tenor Banjos
and Banjo Ukuleles, to select from.
Write for Catalogue
SLINGERLAND BANJO CO.
1815 Orchard Street
CHICAGO
The Piano Repair Shop
Pianos and Phonographs Rebuilt by
Expert Workmen
C. G. CONN, Ltd., Elkhart, Ind.
Player-actions installed. Instruments
rehnished or remodeled and actions and
keys repaired. Work guaranteed. Prices
reasonable.
Our-of-town dealers' repair work solic-
ited. Write for details and terms.
THE PIANO REPAIR SHOP
C. D. GREENLEAF, Pres.
J. F. BOYER, Sec'y
World's largest manufacturers of High Grade Band and Orchestra Instruments. Employs 1,000
expert workmen.
All of the mojt celebrated Artists use and endorse Conn Instruments.
Famous Bandmasters and Orchestra Directors highly endorse and recommend the u*e of the
Conn Instruments in their organizations.
Conn Instruments are noted for their ease of playing, light and reliable valve or key action;
quick response, rich tonal quality, perfect intonation, tone carrying quality, artisticness of design,
beautiful finish and reliable construction.
Conn Instruments are sent to any point in th U. S. subject to ten days free trial. Branch store
or agencies will be found in all large cities. Write for catalogues, prices, etc.
339 South Wabash Ave.
C. G. CONN, Ltd.
Chicago
DEPT. MS.
ELKHART, IND.
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