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Rubi ks QeTMENGAGEMENT 10 Q')
AL ENDAR IcdBy Jack Eidswick
LjLJ L I
RUB K'S CUBE IS A TRADEMARK OF IDEAL TOY CORPORATIONWHICH IS NOT ASSOCIATED WITH THIS BOOK
CHRISTMAS CROSS
CANDY STRIPE
,q% \ p 6TM
ENGAGEMENT 1 Q)CALENDAR
By Jack Eidswick
l Il
I and books
South Bend, Indiana
Magic Ribbons.h, (12x12"):ornelis Escher
To Eric
Acknowledgments:Thanks to all who worked on the concept andproduction of this unique engagement calendar;especially Dennis Thurlow of TAB Books for dates,Patty Walsh for art and design, and Emil Krausefor his editorial assistance.
About the authorJack EidswickJack Eidswick, a Mathematics Professor at theUniversity of Nebraska has devised numerousgeometric puzzles with the Rubik Cube and is theauthor of "Rubik's Cube Made Easy,*". which isthe first solution book that explains themathematics behind the cube.
*Rubik's Cube Made Easy, by Jack Eidswick; Peace Press; 48pp.,illustrated.
Study for the lithograph Belvedere.Pencil, (5x5")Maurits Cornelis Escher, 1958.
DECEMBER 81JANUARY
"God does not play dice."-Albert Einstein.
30Wednesday
Sud7Sunday
31Thursday
28Monday
NEW YEAR'S DAY
1Friday
29Tuesday
2Saturday Isaac Asimov, 1920
JANUARYJohn Horton Conway can solve the cube behindhis back with only a few "peeks."
3Sunday J.R.R. Tolkein, 1892
4Monday
5Tuesday Alan Watts, 1915
6Wednesday
7Thursday
8Friday
9Saturday
DOTS
l
i
I
JANUARY"...all that can be truly said of the sense-organismis, that, under different circumstances theyproduce different sensations and perceptions."
-Ernst Mach. The Analysis of ensation. 1914.
11Monday
12TuesdayI
MARTIN LUTHER KING DAY
15Friday Edward Teller, 1908
1.
16Saturday
13Wednesday
Sunday14Thursday
JANUARY"How often have I said to you that when you haveeliminated the impossible, whatever remains,however improbable, must be the truth."
-Sherlock Holmes. Sign of Four.
17Sunday Ben Franklin, 1706
18Monday
19Tuesday
20Wednesday
21Thursday
22Friday
Saturday Jack Eidswick, 1934
JANUARYThe human heart beat is 0.5-2 sec; a Sclar Day is 8.64x104 sec; aLunar Cycle is 1.2x102 sec; a Sideral Year is 3.2x10' sec; theGleissberg Cycle (80 yr sunspots) is 2.4x108 seac; the Zero CheckCycle is 5.42x10f sec; the Orbit Cycle is 2.9x1012 sec; a GalacticCycle is 7.04x10' sec: the Universal Cycle is 6.3x101' sec.
25NIMonday Joseph-Louis Lagrange, 1736
26Tuesday
27Wednesday Lewis Carroll, 1832
281Thursday
29StFriday
Saturday
24Sunday
JANUARYFEBRUARY
"Of which we cannot speak we have to remainsilent." - Ludwig Wittgenstein. Tractatus.
1Monday
GROUND HOG DAYPunxatawney, Penna.
2Tuesday
3Wednesday
4Thursday
5Friday
6Saturday Firt Moon Landing, ION
31Sunday
UPSWINGER 1
sTAFRT
END
FEBRUARY1) No body in a place no larger than itself
is moving.2) Every body is a body in a place
no larger than itself.3) Therefore, no body is moving.
-Zeno's Paradox No. 1 syllogism by Charles Pierce,Collected Papers c.1912.
7Sunday
8M onday Jules Verne, 1828
9Tuesday
10Wednesday
11Thursday Thomas Edison, 1847
LINCOLN'S BIRTHDAY
12Abraham Lincoln, 1809Friday Charles Darwin, 1809
13Saturday Galilei Galileo, 1564
FEBRUARY"When the bishops (Council of Ncea) took their places upon the thrones theywere 318; when they rose to be called over, it appeared that they were 319; sowhen they approached the last of the series he immediately turned into thelikeness of his next neighbor ... it is perfectly possible to imagine a universe inwhich any act of counting be a being in it annihilated some members of the classcounted during the time and only during the time of its continuance."
-A.N. Whitehead, Mathematics, Ency. Brit. 13th edn.
15A.N. Whitehead, 1861M onday Douglas Hofstadter, 1945
16Tuesday
17Malthus, 1478A Wednesday Gary Hosler Meisters, 1932
18Thursday Count Volta, 1795
19Friday Copernicus, 1473
20Saturday
ST. VALENTINE'S DAY
14Sunday
Ae
VERTICAL FLIPPER 1
START
END
FEBRUARY"...the apriority of time does not only qualify the properties ofarithmetic as synthetic a priori judgements, but is oes the samefor those of geometry, and not only for elementary two- andthree-dimensional geometry, but for non-Eucledian and n-dimensional geometries as well. For since Descartes we havelearned to reduce all these geometries to arithmetic by means ofthe calculus of coordinates."
-L.E.J. Brouwer. Bull. Amer. Soc. 20. 1913, p.8 5.
GEORGE WASHINGTON'S BIRTHDAY
22H. Hertz, 1857
George Washington, 1732. M onday Arthur Schopenhauer, 1788
Tuesday
25Thursday
26Friday
ASH WEDNESDAY
24Wednesday
FEBRUARYMARCH
"Projective geometry is all geometry."-Arthur Cayley.
28Sunday Linus Pauling, 1901
3WednesdaGeorg Cantor, 1845
, Wenesdy Alexander Bell, 1114!
4Thursday George Gamow, 1904
2TuesdayI
6SaturdayI
sT
RT
THE REPEAT GAME
opf
END
MARCHThere are 43,252,003,274,498,856,000 (over 43 U.S.billion billion) attainable positions. This number isso large that if you could see a new position everysecond, it would take over 1,000 billion years to seethem all! The age of the universe is estimated to beonly 12-20 billion years.
Tuesday
11Thursday
12Friday
13Saturday
Monday
MARCHIf we placed a living organism in a box... one could arrange theorganism, after any arbitrary flight, could be returned to itsoriginal spot in scarcely altered condition... for the movingorganism the lengthy time of the journey was a mere instant,provided the motion took place with approximately the speed of
-Albert Einstein. Mathematical Theory of Relativity. Cesel-lsch. in Zurich, 56, 1911, p.52.
14,Sunday Albert Einstein, 1879
IDES OF MARCH
15Monday
16Tuesday George S. OhmL=S7
ST. PATRICK'S DAY
17Wednesday
18Thursday
19Friday
Spring Begins
20Saturday
ST
RT
END
CHECKERBOARD
MARCH"It is remarkable that a science which began withthe consideration of games of chance should havebecome the most important object of humanknowledge."
- Laplace.
21J.S. Bach, 1684
Jean Baptiste, 1768Sunday ,sBc,18,Sunday Joseph Fourier, 1768
22Monday
23iTuesday Pierre-Simon de Laplace, 1749
25Thursday
26Friday
24Wednesday
MARCHAPRIL
On aggregate of straight lines being represented asvery narrow rectangles (linelets): "it comes to thesame result whichever way you take it!"
L. Barrow. Lectiones Geometricae 1735.
29Monday
30TuesdayI
31Wednesday Rene Descartes, 1598
ALL FOOLS DAY
1Thursday
2Friday
3Saturday
28Sunday
ST mmml*
R 04T
EeND %
UPS WINGER 2
APRIL"Nobody has ever noticed a place except at a time,or a time except at a place."- H. Minkowski, The Principle of Relativity. London, 1920,
Tuesday
7l Wednesday Charles Fourier, 1772
Passover Begins
8ThursdayGOOD FRIDAY
9Friday
10Saturday
PALM SUNDAY
4Sunday
Monday
APRIL"...the velocity of sound may be for the bees thesame universal constant as is the velocity of light inman's electromagnetic philosophy."
- H. von Foerster. Cybernetics. 1951.
14Wednesday
15Thursday Leonard Euler, 1707u sday Leonardo da Vinci, 1452
16,Friday Wilbur Wright, 1867
17Saturday
EASTER SUNDAY
11Sunday
12Monday
13Tuesday
THE TWELVE CUBE WORLDS
APRIL"One cannot assign a relation in space to what isdetermined only in time."
-I. Kant. Sommti. Werke. V.10, p.112, 1839.
19Monday
20Tuesday
21Wednesday Immanuel Kant, 1724
22Thursday
Friday Wm. Shakespeare, 1564
24Saturday
Sunday
APRIL MAY"The moving finger writes; and having writ,
Moves on: nor all your Piety or WitShall lure it back to cancel half a Line,
Nor all your Tears wash out a Word of it."
25Sunday
26M onday David Hume, 1711
27Tuesday Samuel Morse, 1791
28W.TednesdayI. Newton pubi. Principia, ^1686
29Thursday Henri Poincare, 1854
30Friday Carl Friedrich Gauss, 1777
1
Saturday Pierre T DeChardin, 1831
MAY"Now I maintain that, if he had lived forever, andnot wearied of the task, then, even if his life hadcontinued as eventfully as it began, no part of hisbiography would have remained unwritten."- Bertrand Russel. The Principles of Mathematics. 1937, onSterne's Tristram Shandy Paradox.
2Sunday
3Monday
4Tuesday
5Wednesday
6Thursday
7Friday Peter I Tchaikovsky, 1849
8Saturday
MAY"Our consciousness weaves a route at randomalong the ever-branching evolutionary pathway ofthe cosmos, so it is we, rather than God, who areplaying dice." - Paul Davies. Other Worlds.
MOTHER'S DAY
9Sunday
10Monday
11Tuesday
12Wednesday
13Thursday
14Friday Gabriel Farenheit, 1686
15Saturday Pierre Curie, 1859
START
END
ZIG-ZAG
MAY"...at the end of the century the use of words andgeneral educated opinion will have altered somuch that one will be able to speak of machinesthinking without expecting to be contradicted."
- Alan M. Turing. Computer Machinery. Mind. LIX, 1950.
Tuesday
20Thursday joh S. Mill, 1806
211 Friday
22Saturday
19Wednesday
Monday
MAYAny permutation can be written as a product oftranspositions in many ways, but the number offactors will always be even or always odd.
The cube group has 2 generators!
23Sunday Linnaeus, 1707
24Monday
Tuesday
26Wednesday
27Thursday
28Friday
29Saturday
START
THE REPEAT GAME
v0
-f'
END
N
13W
MAYJUNE
"Space is a snapshot of time, and time is space inmovement"
- lean Piaget. Construction of Reality in the Child.
30SundayMEMORIAL DAY
31Monday
2Wednesday
1TuesdayI
3Thursday James Hutton, 1726
4Friday
5Saturday Socrates, 468 B.C.
JUNE"The truths of reasoning, are necessary and their opposites isimpossible; truths of fact are contingent and their opposites ispossible.... But there must also be a sufficient reason for con-tingent truths or truths of fact."
-G.W. Leibniz. Monadology. p.236. c. 1721
9Wednesday
10Thursday
11Friday
12Saturday
6Sunday
7Monday
8Tuesday Frank Lloyd Wright, 1869
JUNE"The mathematical continuum cannot begin to be determined.This concept is understood precisely by appealing either to theidea of time or that of space, for these ideas themselves can onlybe clearly explained by means of a continuity concept whichmust be more primitive and independent of them....'- Georg Cantor. Grundlagen einer allgemeinen Mannig-Jatichkeitslehre. Leipzig, 1883, p.29 .
Tuesday
17Thursday M.C. Escher, 1898
18Friday Erno Rubik, 1937
19Saturday Confcou, 51v aura Blaise Pascal, 1623
16Wednesday
Sunday
Monday
JUNE"Actualities seem to float in a wider sea of pos-sibilities from out of which they were chosen; andsomewhere indeterminism says, such possibilitiesexist, and form part of the truth."
-William James.
FATHER'S DAY
20Sunday
21Palo Soleri, 1919M monday Jean P Sarte, 1905
22Tuesday
23Wednesday
24Thursday
25Friday George Orwell, 1903
26Saturday
OUT OF THIS WORLD
JUNE JULYRead about the mirror problem in:
il9j\jrfgiH q 191eeI g'io0IIiM OQ yffW,7fnwoU\qU ton briB
The Journal of Philosophy, 1974, pp259-277.
30WednesdayDOMINION DAY
1Thursday Gottfried Leibniz, 1646
2Friday Herman Hesse, 1677
3Saturday Franz Kafka, 1883
27Sunday
28Monday
29Tuesday
JULY"All the objects of our world are 3 D images formedthus electromagnetically - super-hologram imagesif you will."
- C. Muses and A. Young. Consciousness and Reality.
INDEPENDENCE DAY
4Sunday Rube Goldberg, 1878
5Monday
6Tuesday
7Wedn sdayRobert Heinlein, 1907LWe d nesday Nikola Tesla. 1856
8Thursday
9Friday
10Saturday
A?
VERTICAL FLIPPER 2
sT
RT
END
JULYTo see a world in a grain of sand
And a heaven in a wild flowerHold infinity in the palm of your hand
And eternity in an hour-Blake.
12Monday Buckminster Fuller, 1895
13Tuesday
151 Thursday Rembrandt, 1606
16Friday
17Saturday Robert Hooke, 1635
14Wednesday
Sunday
JULY"Projective geometry is all geometry."
-Arthur Cayley.
Impossibilities: A single edge flip, a single cornertwist, a single edge-pair swap, a single corner-pairswap.
18Sunday
19Monday
20Tuesday
21I Wednesday Marshall McLuhan, 1911
22Thursday
I Friday
24Saturday
sT
RT
DOUBLE EDGE-PAIR SWAPPER
END
JULY"All things no matter what their qualities are bitsof space-time... and empirical things are 'vorticesor eddies in the stuff of Space-Time, and universalsare the laws of their construction."-Samuel Alexander. Space, Time & Diety. London 1920, p.226.
26Monday Aldous Huxlev, 1894
27Tuesday
30Friday Henry Ford, 1862
31Saturday
28Wednesday
Sunday29Thursday
AUGUST"...if our methods only were sufficient ananalytical mechanics of general life processes itwould be possible and fundamentally would reacheven to the problem of the freedom of the will."
-Emil Du Bois-Reymond, 1848.
Sunday
2Monday
3Tuesday Wiliam Hamilton, 10
4Wednesday
5Thursday Niels Henrik Abel, 1802
6Friday
7Saturday
ZIG-ZAG +
CHECKERBOARD + DOTS
zzz
FL0wERS
,4dbo--,
AUGUST"It is possible, as we know, to construct ageometrically regular 3-dimensional solid - say, acube - which in the real world possesses acounterpart in the form of a die; and it is equallypossible to create geometrical solids of four, five,n-dimensions... -
- S. Lem; personetics in D. Hofstadter's The Mind's 1.
9Monday Jean Piaget, 186
10Tuesday
12Thursday
13Friday
14Saturday
11Wednesday
Sunday
AUGUST"there is not one way of measuring time more truethan another; that which is generally adopted isonly more convenient."
- H. Poincare, Value of Science.
To Newton the universe has a clock, whereas to Leibniz it is aclock.
15Sunday
16M onday Arthur Cayley, 1821
17Tuesday Ben Franklin, 1706
18Wednesday
19Thursday P.D. Ouspensky, 1897
20Friday Pierre Fermat, 1601
21Saturday Augustin-Louis Cauchy, 1781
AUGUST"...communication is the fact that the representation producedis (or purports to be) a replica of a representation already pre-sent to (with in the mind of) the sender. Communications is theactivity of replicating representations."
- D.M. MacKay. Cybernetics. VIII.
261 Thursday Le De Forest, 1873
27, Friday
Saturday Leo Tolstoy, 1628
25Wednesday
Monday
24Tuesday
AUGUSTSEPTEMBER
If you take the cube apart and reassemble it ran-domly, chances are 11 out of 12, you'll do it wrong.
1Wednesday
2Thursday
31Frida y Loren Eisley, 1907
41Saturday
29Sunday
30Monday
31Tuesday
AUGUST"...communication is the fact that the representation producedis (or purports to be) a replica of a representation already pre-sent to (with in the mind of) the sender. Communications is theactivity of replicating representations."
- D.M. MacKay. Cybernetics. VItI.
25Wednesday 1
26Thursday Le De Forest, 1873
271 Friday
28Saturday Leo Tolstoy, 1828
22Sunday
23Monday
24Tuesday
AUGUSTSEPTEMBER
If you take the cube apart and reassemble it ran-domly, chances are 11 out of 12, you'll do it wrong.
29Sunday
1
Wednesday
2Thursday
3Friday Loren Eisley, 1907
4Saturday
31TuesdayI
sT
RT
DOUBLE EDGE FLIPPER
END
SEPTEMBERIn practice there is "an unspeakable abyssbetween the finite and the infinite."
-A. Fraenkel Abstract Set Theory. 1953.
5|Sunday Arthur Koestler, 1905
LABOR DAY
6Monday
7Tuesday Kemeny solves Carroll probl., 1956
10I Friday
11SaturdayI
8WednesdayIThe famous Coconut Problem 1st appeared in print. October9,1926, by Ben Ames Williams in Saturday Evening Post.[Answer: 3,121|.
9Thursday
SEPTEMBERIf grammar represents an image of our structure, then the imageof culture can be expressed quite literally as a syntax of par-ticular rites, processes of biological and economic exchange,myths, legends and image-patterns."
- C. Levi-Strauss. 1965.
12,Sunday
15Wednesday Pavlov, 18
16Thursday
17Friday Georg Riemann, 18.
Rosh Hashana
18Saturday
14Tuesday A. von Humboldt, 16
SEPTEM BER"Specifically, it will almost always create new memory require-ments, since the results of the operations that are performedfirst must be stored while the operations are performed. Hencethe logical approach and the structure in natural automata maybe expected to differ widely from those in artificial automata.Also, it is likely that the memory requirements of the latter willtun out to be systematically more severe than those of theformer."
-J. von Neuman. Computer and the Brain. 1958.
22Wednesday Michael Faraday, 1791
23Thursday
24Friday
25Saturday
Sunday
20Monday
SEPTEM BEROCTOBER
"...we do not see in order to know the world, but toexist in it."
-G.W. Zopf. Sensory Hoomeostasis. 1963.
26Sunday Martin Heidegger, 1889
Yom Kippur
27Monday
28Tuesday
29WednesdaEnrico Fermi, 190Wednesday Frank Gilfeather, 184
Thursday
1Friday
2Saturday Aristotle, 384B.
UPSWINGER 3
Al,-
STAlb
T
END
ON- -
BI--,' -
110,
I
OCTOBERAn interesting and unexpected discussion of Zeno'sAchilles Paradox is to be found at the beginning ofChapter 22, Book 12 of Tolstoy's War and Peace.
3Sunday
4Monday
5Tuesday Denis Diderot, 1713
6l Wednesday La Corbusier, 1887
7Thursday Niels Bohr, 1885
8Friday George Westinghouse, 1885
9Saturday
OCTOBER
Lagrange's Theorem: The order of a subgroupalways divides the order of the group. The order ofthe cube is 227 x 314 x 53 x 72 x 11.
10Sunday
11MondayCOLUMBUS DAY
12Tuesday
13Wednesday
14Thursday
15Friday
16Saturday
OCTOBER"But Thought's the slave of Life,
and Life Time's Fool;And Time, that takes survey of all the World,
Must have a stop."-Shakespeare. Hostpur, Henry IV.
18Monday
19Tuesday Peter Max, 1937
17Sunday
21Thursday
22Friday
23Saturday
OCTOBER"Practically we percieve only the past, the pure,present being the invisible progress of the pastgnawing into the future."
- Henri Bergson. Matteriand Memore. 1911, p.194.
25Pablo Picasso, 1881M M onday Evariste Galois, 1811
26Tuesday
27Wednesday
28Thursday Erasmus, 188
29Friday
S30Saturday
24First working model of the BiivdsKockaSunday (Magic Cube) built by Erno Rubik, 1973.
sTALRT
es15 *�\O
END
v DOUBLE -11�CORNER-PAIR SWAPPER
OCTOBERNOVEMBER
"One Moment in Annihilation's Waste,One Moment of the Well of Life to taste..."
HALLOWEEN
31Sunday Karl Weierstrass, 1815
1Monday
Election Day
2Tuesday George Boole, 1815
3Wednesday
4Thursday
5Friday
6Saturday
NOVEMBERGary Meisters: Yes; 6 bars are possible.
Morwen Thistlethwaite has a computer solutionthat is only 52 moves long. Experts estimate thatGod's algorithm is 22 or 23 moves long.
7Sunday Marie Currie, 1867
8M onday Albert Camus, 1913
9Tuesday
10Wednesday Analytic Geometry born, 181
VETERAN'S DAY
11Thursday
12Friday James Maxwell, 183
13Saturday
NOVEMBERHofstadter's Law: Itexpect, even whenstadter's Law.
always takes longer than youyou take into account Hof-
15Monday Robert Fulton, 1765
16Tuesday
18Thursday
19Friday
201SaturdayI
17Wednesday
Sunday
NOVEMBER"motion does not produce time for use; it onlyproduces for us days, months, and years. Time, onthe other hand, exists per se, and is not an accidentconsequent upon motion."
- Ibn Abi Said, loth century writer.
21,Sunday
22Monday
23sTuesday
24Wednesday
THANKSGIVING
25Thursday
Friday Alice in Wonderland publ., -
27Saturday 1st Nobel Prize, l8i
4 BARS
STAl
T
END
NOVEMBERDECEMBER
"Mirror on mirror mirrored is all the show."-Yeats.
28Sunday William Blake, 1757
29Monday _______ I
IWednesday
2Thursday
3Friday
4Saturday Walt Disney, 1901
DECEMBER"...for the mind in creation is as a fading coal,which some invisible influence, like an inconsis-tent wind, awakens to transitory brightness... andthe conscious portions of our nature are un-prophetic either of its approach or its departure."
-Percy Bysshe Shelley.
5Sunday
8A Wednesday Herman Rorschach, 1884
9Thursday
11Saturday
7Tuesday Noam Chomsky, 1928J uesd y Leopold Kronecker, 18231
DECEMBER"...the reason why our senient, percipient, and thinking ego ismet nowhere within our world picture can easily be indicated inseven words: because it is itself the world picture. It is identicalwith the whole and therefore cannot be contained in it as a partof it."
-I. Schrodinger. Mind and Matter. 1959, Cambridge.
13Monday Nostradamus, 1503
14iTuesday Alex Eiffel, 1882
16Thursday Arthur C Clarke, 1917T rL. von Beethoven, 1770
17Friday
181SaturdayI
Sunday
DECEMBER"...the Cube has cosmic qualities. It has somethingof the laws of the universe in it. It is simple in formbut complicated in solution. It addresses questionsof order and chaos, of harmony and discord. Onemust search within oneself for one's own answer. Itbecomes a deeply personal thing."
Erno Rubik, 1981.
19Sunday Albert A Michelson, 1852
20Monday
Winter Solstice
21Tuesday
22Wednesday
23Thursday
2W941 Friday
CHRISTMAS DAY
o2
Saturday Isaac Newton, 1642
START
THE REPEAT GAME
times
END
al * *
DECEMBERJANUARY
The maximum cyclic subgroup order is 1260.
26Sunday Charles Babbage, 1792
Norbert Weiner, 1894
29Wednesday
30Thursday
27Monday Louis Pasteur, 1822
31Friday
28Tuesday Claude Levi-Strauss, 1908
NEW YEAR'S DAY
1Saturday
ADDnRES PHONENAME sw & .. sso
1982JANUARYM T1 W T F S S
4 56 78 91011 12131415161718 1920 21 22 2324
252 2 829303
FEBRUARY MARCH JAPRILMT T S T~WTF MTW FS
12 34 5 67 I 23 456 7 1 23 48 9 1011 1213 14 8 9 10 111213 14 5 6 7 ~8 9 10 1115 16 1718 19 20121 15 16117 181I9 2021 12 13141516 17 18
2222526228222324 252-6i27 28 19 20 21 2223 242529 30~31 622823
MAYMT W T F S S
1 23 4 5 6 7 8 910 11 12 13 14 151617 18 19 20 21 22 2324 25 26 27 28 29 3031
SEPTEMBERRMTWT F S S
1 234 56 7 8 9101112
13 14 15 16 17 18 19~2021 2223 24 252627 2829 30
JUNEM TW T
1 237 8 9,10
14 15 16 1721 2223 24
28230
OCTOBE-RM
41 11825
T
51 21 926
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FS S4 56
11 12 1318 19,2025 2627
F SS1 238 9 10
15 16 1722 23 24
29303
JULYMI
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Tf18
152229
iT29
162330
310172431
Y4
1 11825
NOVEMBERM T WT F S S
8 9 10 111213 1415 16 17 18 19 202122 2324 25 2627 28
AUGUST
9162330
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9 10 111216 17 18 1923 24 2526
MEMO MEMO MEMO
Rubik's Cube Engagement Calendar, 1982.
Copyright©1981 by Jack Eidswick & and books
All rights reserved,No part of this book may be reproducedin any form without permission in writingfrom the copyright holder.
Published byand books702 South MichiganSouth Bend, IN 46618
Printed in the United States of America0 9 8 7 6 5 4 3
Additional copies available:the distributors702 South MichiganSouth Bend, IN 46618
ISBN: 0-89708-081-5 Belvedere. [Partial) Maurits Cornelis Escher, 1958.