The E-Discographer #4 January 2002
Edison Lateral Cut Recordings -- N prefix pressings? and
A Study of Pressing Problems
By Ray Wile When my Complete Edison Lateral Record Catalog was first published
in the Record Research of August 1963 it was based on Company listings and
actual copies in my collection or upon information provided by various members
of the Record Research Syndicate. Of particular use was a listing supplied by
Bob Colton and Lenny Kunstadt based on examination of copies located in stores,
private collections and elsewhere. This was helpful in the case of recordings
that were in the works at the time that record production ceased since it was
not certain whether actual copies had been produced. In the ensuing years
additional scraps of information have surfaced but otherwise the listing has
stood the test of time.
However, a few years ago I noted an unusual item in one of Kurt Nauck's auctions
-- an Edison lateral pressing with an N prefix in front of its series number.
This seemed unusual so I bid it in. On receiving it I found that Kurt had been
correct in his listing and that it indeed was N11033, a recording that had been
assigned an issue number but had never been included in any of the supplements.
I then checked among my Xeroxes and examined one which I had ordered several
years before. It was a copy of a scrapbook in which Harold Anderson had mounted
copies of lateral labels. The notebook included many N labels and in some cases
included regular issued labels mounted on top of what must be N labels. I also
checked a few Lateral ads that were located in the Primary Printed Materials
files. While it is always dangerous to theorize from one example I believe the
following must have happened. The 11000 series, which was the Standard series
was the first to receive matchings. The recordings were indeed standard and were
intended to be released at a rate of 6 per month (75 per year), the 20,000
series, the Southern series was scheduled at 5 per month (60 per year). In both
of these series the N label copies predominate. In addition there is a group of
N labels in the 31,000 series. I believe that some sample pressings were
prepared and circulated before the formal beginning of issue for comment, or to
be pictured in advertisements. This is borne out by an article found in the
primary printed materials file in the Edison Archives. "Unusual interest
throughout the trade has followed the announcement by Thomas A. Edison, Inc., of
lateral cut records ... on the occasion of welcoming the Blackman Distributing
Co. As an Edison wholesaler ... Production of the Edison lateral-cut record has
already been started in the recording laboratories in Orange, and the first
samples of the disc were given as souvenirs to the guests of the Blackman
banquet. This is recorded by B. A. Rolfe and his Concert Orchestra electrically,
and it bears the numbers N-11018-R and N-11018-L ..."
Checking a xerox of a listing of regular and N matrices that was maintained from
the Fall of 1927 through the end of recording it seems that in the late Fall of
1928 classical matrices were evaluated for issue. It was not until the end of
April that this was done for the "popular" type of material. Since July saw the
shipment of basic stock material the use of N prefixes was limited. Although
label copy was prepared there would be relatively few.
This opens up the probability that many of the listings we published in 1963
exist somewhere in one form or another. The only exception would be in the case
of records that were to have been shipped after October 22, 1929. We know of a
few from the 29th but the existence is spotty. Years ago I picked up 20010
(10/22/29) and 20011 (10/29/29) while junking in New Jersey so there are
possibilities. My hunch is that these were in initial production and were sold
in the general factory clearance. The one thing that is certain is that if you
own an N prefixed lateral cut Edison you have a rare animal indeed.
Possible issues with only an N prefix.
N-11004 through N-11006; N 11008 through N 11009, N-11011 through N-11015,
N-11018 through N-11031; N-11033 and N-11035; N-11040 through N-11042; N-11045;
N-20003 through N-20005; N-31001 through N-31003.
Label copy was prepared as N prefixed and as regular for the following 11002,
11010; 11015.
When the listing was first published we listed 11048 as follows: 11048 Rel. N6
(This was canceled).
B. A. ROLFE & HIS ORC. - Why can't you -FT (N1041A)
Phil SPITALNY'S MUSIC - Sentimental (N1029C)
The label book contains copy for the following:
11048
NEW YORK MILITARY BAND - Semper fidelis match (N290B)
NEW YORK MILITARY BAND - From tropic to tropic (N289B) *
* The label copy did not indicate matrix and take information. This was supplied
from the set of two notebooks listing actions taken in regard to matrices that I
mentioned previously. It should also be noted that these were listed there as
Band. New York Military Band was supplied later.
For the benefit of our readers we include a xerox of some of the early 11000
series label copy.
In addition the following additions to take letters were reported over the
years:
11007 (N359A)
(N940B) but I have an A take.
14045 (N1053C) but a B take has been reported.
(N1054C) but a B take has been reported.
20010 (N1023C) but I own an A take.
(N 1024C) but I own an A take.
20011 (N1159C) but I own a B take.
(N1158B) My copy has the same take.
For those readers who still own the original copy of the Record Research issue I
can report that the majority of the Iabels on the front cover were prototypes:
N11001 and N11002 were the earliest. 47003L is also a prototype.
Lateral Shellac Formulas
We also include information from one of the Laboratory notebooks in which
various proposed (or used) shellac formulas were listed.
A Study of Pressing Problems. During the period of the Edison
Diamond Disc studies were sometimes undertaken of the processes. At one juncture
when surfaces were particularly bad such a study was undertaken. At its
conclusion the individual responsible for it eventually threw up his hands in
horror. I need not specify the period, any Edison collector will immediately
recognize it. While gearing up for the first laterals, and beginning in July
1929 a study was made of shellac pressing problems. We include a reproduction of
the notes for the benefit of our readers.
The Edison Recording Studios in 1929. At the end of January 1929 the
recording studios closed and moved into new quarters at 79 Fifth Avenue a few
days later. Almost immediately it was discovered that these were unsuitable for
larger groups. After some experimentation an additional studio was opened at 635
Sixth Avenue. I believe this was in June or July. We include a rough diagram
made in 1941 by Fred Rabenstein, who had been the paymaster at the recording
studios.
The end of recording. In 1921 or 22 Paul Kasakove, fresh out of college,
was hired by Edison to speed up the issuance of recordings. As a result of his
work the long lead in time between recording and issue was cut drastically. Mr.
Kasakove once said to me that he could see the end of the record division when
he was transferred to work on plating Edison appliances in June or July 1929.
The formal study Discontinuing the Record Business was submitted to
Charles Edison on October 14, 1929 and was located in his former office when I
had it copied in the early 1970's. Unfortunately the Xerox used by the Site at
that time was having indigestion and provided some particularly bad copy that is
not suitable for reproduction. Once the study was completed the end was swift
and the announcement to the trade concerning discontinuance was made on October
30th.
Research Notebook on Edison Lateral Pressings
1929 N Records
July 10th Wednesday. No I No 100511
Intending to do some work on the causes of warping of the lateral records, I
looked over my available literature on the subject of moulding with shellac and
substitiutes. Literature is scattered and vague, no good clues -- except that
objects formed of shellac bend and warp especially in sunlight. No peculiarities
given in regard to "setting" of shellac or mixtures or any strains set up in
solidification.
Thursday July 11th.
Discussed with Mr. Buchanan investigation work in Powder Blank Dept. Mr. B
suggests to find cause (and preventive means) of formation of "blisters" on the
lateral records.
Inquired at Powder Blank Lab. about methods they use in shellac testing and of
the materials that go to make up the "gobs" of the lateral records.
Tried to get more detailed information on properties of shellac, especially when
used in mixtures for moulding & printing but find very little theoretical &
practical with the exception of a few vague and rather irrelevant points in
Ellis's "Synthetic Resins".
Collected blistered records and samples of the materials that go to make up the
gobs: -200 mesh rock, cotton flock, shellac (2 kinds : orange & garnet), carbon
black.
July 12th, Friday.
Made some qualitative tests with materials for powder blanks. Find that both
samples of shellac contain what is called 'lac', the dye which is extracted
quite readily with boiling water & especially with alkaline solutions.
The sample of "Rock" contains a rather large amount of carbonic acid -- much
more than I expected.
The "rock" is Epidote from our quarry where they call it Greenstone.
Epidote is an anhydrous Calcium Aluminum Iron Silicate, hardness between 6 & 7.
Composition: H Ca {Al Fe} 3 Si3 O13
sp. g. 3.25 - 3.50 (fuses fairly easily to blackish mass - which may be magnetic
at times).
Inspected blistered specimens of records with magnifying glass and prepared
sections of them.
Possible causes of the blisters or breaks thru the surface: 1) Not likely to be
trapped air because blistering takes place after cooling of the finished record
has been accomplished; it also happens that on standing sometimes a blister
bursts out with a loud sound like a sharp crack.
2) Internal strain may be set up by the shellac after cooling (contraction or
expansion) - but visual inspection is against this except in one case out of
several in which a longitudinal crack was visable inside after brealing the
record thus: [image] if this crack is caused by internal strain and later by
warping, there are some other blisters which look quite different.
Some of these I refer to have the following cross section: [image]
They show a spherical hollow at the bottom condensing into a crater toward the
top of the record. This may perhaps point towards a gas which is evolved under
the heat and pressure of the printing. This gas is confined under great strain &
pressure until breakage occurs.
The crater measured up to 1/4" diameter in widest place, one had 7/16" dia.
Peculiarity of blisters:
One kind of blisters which are not broken open on top of record but only bulge
out, are mostly visable on both sides of the record in the same place.
The other kind, the craters which break thru and open on top of the record, show
no deformation on the opposite side, that means at least with the 3 specimens I
inspected and I got no more of these "craters". Read up on moulding of resins,
rosin, shellac etc. Made more cuts of blistered records to have numerous cross
sections for inspection & possible origin of blisters and got another supply for
eventual microscopic examination. Prepared a small batch of a mixture:
2.5% gas black 1.25 g
3.% cotton flock 1.50 g
61.5% rock -200 mesh 30.75 g
11.0% orange shellac 5.50 g
22.0% garnet " 11.00 g
100 .............................50.00 g
Saturday July 13th
Tried to make a gob with the above mixture after tinturating all as well as
possible in a porcelain mortar, then put it in water bath -- Temp. not high
enough -- is very lumpy & hard to stir. Put into Nujol bath -- but if heated too
high acrid fumes come off and this probably changes the properties of the
shellac. What is needed is a kneader or mixer or rolls which are kept hot during
the operation intimately mixing the materials. The mass never gets really soft &
thin, always lumpy and very heavy to move & stir it up. Had to abandon this.
It will be better for any other tests to secure some ready made mixed "dough"
from the Powder Blank Dept. instead of preparing it myself in the lab. where I
have no facilities or tools and apparatus. Spent all afternoon in the 42nd
Street Library to collect information on properties of shellac, tests and uses
in industry and especially if any peculiarities are observed in the solidifying
or setting of finished shellac compounds & mixtures. Information scarce -- and
nothing at all said about strains in solidifying shellac or rosin & resin
mixtures.
Monday July 15th.
Observed some cuts thru blisters under the microscope. Crater formations could
not be focussed satisfactorily on account of depth of crater. Other cuts
such as showed only the longitudinal cracks could be focussed; edges have rough
contour as can be expected under magnification. No clue however to formation or
origin. Fracture is always conchoidal along the cracks. After breaking open many
blisters I find that the crack is always in the center of the record and
along the crack I could not notice that it had its origin in one particular
point or place -so to speak a point of attack for the blister formation. As the
cracks always are in the center it must be concluded that they form at the
junction of 2 gobs and cracking or blistering proceeds from this center line
uniformly outward thus: [image] (junction line is not as well marked in the
record as I have indicated in the sketch - over emphasized it for illustrative
purpose.
The cracks have in a general way the shape of a double convex lense
inside the record, practically always in the center.
The Opinion that the cracks are formed at the junction of 2 gobs is supported by
the information I gathered in the Powder Blank Dept., where I found out that
blisters did not occur when formerly the prints were made not by joining 2
separate gobs but were made directly from the dry and intimate powder of the
ingredients. There was Therefore no junction, the whole mass was anchored
uniformly together instead of being joined always one line or plane. There
simply was no junction and there were no cracks. Made intimate mixture of garnet
shellac and rock only (no other ingredients used) and after melting observed if
any gas evolution takes place in standing and cooling. Did the same with orange
shellac. Great care needed. Mixture is very thick & heavy and on overheating
develops acrid fumes and bubbles. Air remained in the mixture but in solidifying
& cooling it could not be noticed that enclosed air or gas bubbles would break
thru the mixture or bulge up the surface. It will be necessary to get better
observation of the cracks under the microscope by breaking open many records,
get the conchoidal fracture and insert it in plasticine for close inspection
under microscope and just such magnification as will at the same time permit of
taking in a larger field.
Got more information on the manufacturing process and printing.
Rock is ground --200 mesh and the cotton flock is ground into it and with
it. Then the mixture of rock, cotton flock and gas black goes into the "dry
mixer" in which it is mixed by blades on a horizontal shaft at a temp. of 250
degrees F. the purpose of this mixer is to get off all the moisture of which
there is quite some. The mix from this dry mixer is then transferred to the
dough mixer in which garnet & orange shellac are added, mixer kept at 230
degrees F (temp. falls on account of the shellac addition which is ground to -14
mesh. In the dough mixer there also goes a certain percentage of the discarded
records which have been ground to -14 mesh.)
From the dough mixer the mix goes thru 2 sets of rolls then is cut in squares.
Prints are made from 2 gobs (joined) and they go into the moulds which have
about 200 degrees F. as soon as the moulds have got the gobs they go again into
a press just only for warming them up again to about 200 degrees F (they cooled
a little in the process of loading them with the gobs) but no pressure is
exerted in this "hot" press -- only heat is supplied. Are about 2 min. in this
hot press. Then they go into the cold press where they get the proper pressure
but cold water circulates in the platens (no steam at all used in the cold
press) and they remain about 4 - 5 minutes. Are taken out at about 85 degrees F.
Watched quite a while the printing of records in powder blank - but by chance
not one blister evolved a blister while I was watching. On questioning I hear
that in hot and humid weather the rejects on account of blisters is much greater
than in cool weather - therefore it is obvious that humidity & heat have a
relation to the blisters.
Put up a ____ometer and get data on rejects with information on humidity and
temp.
It may be that on humid days the men sweat & handle water or drinking cups.
Thursday July 18th P.M.
Thought that it may be of interest to get the cooling curve or solidification
curve of shellac, to see if there is anywhere an arrest in the cooling or any
indication that the physical structure of the shellac changes at a certain
temperature and sets up a strain or stress inside the material which in the
badly joined or anchored places gives rise to formation of cracks.
Data for cooling or solidification curve of garnet shellac: from 139 degrees C =
282 degrees F downward: temp. observed every 30 seconds. Could not secure any
more precise thermometer than one divided into whole degrees Centigrade without
any smaller divisions. None of the better kind was available, not even in room
#2 where there was a precision instrument but its range was entirely
insufficient.
Please address all correspondence to ddiehlusa@netscape.net
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