PROJECT BLUE BOOK

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PROJECT 10073 RECORD CARD

1. DATE

2. LOCATION

.
26 October 1962 Chornus Christi, Texas
3. DATE-TIME GROUP 4. TYPE OF OBSERVATION
Locol 2pm @ Ground- Vi sual 0 Ground-Redaor
GMT 26 /2000Z. 0 Air Visuol 0 Air-Intercept Rodar
5. PHOTOS é. SOURCE
OYes Physical
OWe Snecimen Civilian
7. LENGTH OF OBSERVATION 8. NUMBER OF OBJECTS | 9. COURSE
not reported one falling

12. CONCLUSIONS

Was Bolloon
Probably Bolloon
Possibly Balloon

Was Aircraft
Probobly Aircroft
Possibly Aircraft

Was Astronomicol
Probobly Astronomical
Possibly Astronomical

t~* Other gl ass

OD Insufficient Data for Evaluction
0 Unknown

oqq ang aad

10, BRIEF SUMMARY OF SIGHTING

Piece of translucent material reporte#
to have fallen from sky striking
Material forwarded

plow of farmer,
to ASD for analysis,

{Potiram OF odyJecyT Mis

11. COMMENTS

Seep Nen Fite)

Analysis showed material to be
bottle glass from large bottle,
Pattern on glass indicated
manufactured by Illinois Owens
glass company.

ATIC FORM 329 (REV 26 SEP 52)

January 10, 1963

Maj. S. F. Brokeshoulder

Asst. Chief, Analytical Branch
Physics Laboratory

Aeronautical Systems Division
Wright-Patterson Air Force Base, Ohio

Dear Maj. Brokeshoulder:

For your information, I am sending to you herewith a
copy of a letter which we have received from our Technical Center
concerning the class sample which you forwarded to me. The glass
sample is also being returned to you herewith.

It appears that your judgment as to the probable source
of this fragment was correct. lI sincerely trust that this informa-
tion is helpful to you.

Yours very truly

Legal Department

va
enclosure

Owens-ILLInotIs

INTRA-COMPANY () CORRESPONDENCE

January 9, 1963

Attention of

Mr. L. H. Farmer, Jr. = O-I Bldg. ae oe Division
‘ “HNICAL Centren
cc: Dr. C, L. Babcock - T.C. ToLepo, Onto
Mm ’ ,
Subject Dr. J. M. icague - T.C.

Giass Sample Received from the Air Force

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Examination of the subject sampie indicated that the largest
fragment possessed both a blown surface and a molded surface which
was crackled. Since these two surfaces were opposite each other,
the wedge-shaped area between these surfaces represented the thick-
ness of the original sample. This thiclmess varied from 1/2'' to 3/4''.

. enerally speaking, the molded surface of these fragments was
| practically identical to the crackled surface of the bottom of large
carboys, acid bottles or the 5 gallon wide-mouthed jobs currently sold
for ''Gardens in Glass.'' In addition to the raised crackle lines,
definite depressed lines or crevices were also present. Microscopic
examination indicated that these lines or crevices were shear marks.
A Therefore, the ware was made from a sheared gob.

Considering the foregoing characteristics, it appears that the
glass fragments may have originated from one of the larger carboys or
wide mouth jars having capacities of 5 or 6-1/2 gallons. Also,
evidence of a sheared gob would indicate that the ware was machine

made. I believe that our Alton Plant is the only plant having the
necessary machinery to do these large jobs. Therefore, it is quite
possible that the glass sample represents Alton flint composition.

Emersion in monochlorobenzene indicated that the glass fragments
. have a refractive index similar to ordinary soda-lime-silica glasses.
. On the basis of the foregoing information, it appears taat a chemical
analysis is not necessary. Therefore, the sample is being returned with

this correspondence. |
ZO, alagedornd
B, 0

>, Hagedorn
Glass Technology

ji

——— ee —- —_—- —~— ——-.

AERONAUTICAL SYSTEMS DIVISION

WRIGHT-PATTERSON AIR FORCE BASE, OHIO

(

LABORATORY

EVALUATION REPORT

Analysis of Glass-like sample.

REPORT NR: 62-24 DATE: 3 December 1962
Project nr: 5140(116) TYPE EVALUATION:
MANUFACTURER: SPEC NR:

, SUBMITTED 8Y: [¢, Col. R. J. Friend ITEM SERIAL NR:
I. PURPOSE

ae

b.

Ce

gz.

To chemically analyze a Glass-like sample.

II. FACTUAL

The sample was assigned ASRCPA control number 10,360.

It was tested for radioactivity using a scintillation counter.
No radioactivity above normal background was detected.

The sample was tested for the transmission of light in the region
from the far ultraviolet to the far infrared. It has good trans-
mission only in the near infrared region, 0.75 to 1.75 microns.

it has about 10% transmission in the visible region, 0.4 to .75
migrons, and about the same transwission as plate glass elsewhere.
ke is not a useful window material outside the near infrared.

It breaks along a plane of cleavage when it has been sharply
struck with a 4-ounce hammer. The slivers and sharp edges crumble
when tested by finger. The sample has undergone some form of mild
heat treatment such as fire polishing.

Chemical analysis for carbon and hydrogen using microchemical
techniques detected no carbon and only 0.16% by weight of hydrogen.
This concentration of hydrogen is less than the allowable error of
+ 0.3%; consequently the significance is negligible.

Analysis by light emission spectrography provided these data;

—-

THIS REPORT

iS NOT TO BE USED IN WHOLE OR IN PART FOR ADVERTISING OR SALES PROMOTION PURPOSES

:

— —— — —

ASD SCR. £4

JUN 61

REPLACES WADD FORM 64 WHICH IS OBSOLETE. pa AF-WP-B-JUL 61'5M

7
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Ge

the

i.

Re

1.

Clewont Concentration (% dy weight)

Siliesn greater than 10
Sodius greater than 10
Calcius 10
Potassiua lees then i
Alvuaiaus 0.5
Rorsn less then 0.1
Legeeed leas than 0.3
iron 9.05
Titanium 0.94
ienganese less than 0.0}
Tis leas thea 9.92
Copper ieee then 0.01
Wee chemical anslysia previded these Jata:
Cuides Weight Percent
‘Silieon dionide 70.53%
Caleios cuide 13.62%
Sedius caide 10.35%
Yagnesiua oxide 1.15%
Yotasetum oxide 0.94%

The deasity of the sespie ts 2.231 gies.
The index of refraction ie 1.4663.

Despite the lene like configuration, the sample does not focus
dizest sunlight. The sucoth ridges om the piene surface cause
i ecatteced Aight patters.

An S-cap diffraction pattern of the glass-like sample showed 3
principal component of non-crystalline silica. This identizi-
caties wes evufirmed by infrared anelysia in the 2 - to - 16

miesvea regtoa.

Esponese be on i-rey bean for fifteen mimetes caused © brown
disecleration te fors.

11%. ONCLUSIONS:

ae

the sheence of crystalline silica and bigh concentration 22

godium ouide show thet this glace ia a low quality type of clase.

ASCP 52-23 2

b. the chenical composition and low melting temperature confirm
Chat the sample is @ “bottle-siase” formilatica.

iv. 2ecoremparzons
Nowe, data asrely submizted.

PREPARED BY:

Ailewvevn cf Corste, § Ow

Selomon 7.
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PUBLICATION XEVIEW
This report hes been reviewod and is opproved.

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OISTRIDUT ICs DRERMAN 7. SENTLEY

LE. Gol. 2. Jo Friend Chie@é, Analytical Sranch
ASCP Physica Laboratory

Asacyva (5 cys) Diw of materials & Processes
ASACE Librasy