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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.

Early 11000 series
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.

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