A Duodecimal Scale, V1.0

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A Duodecimal Scale, V1.0 The Dozenal Society of America A Duodecimal Scale Edward Brooks, Ph.D.∗ he mode of reckoning by twelves and measures, as twelve ounces to a pound, or dozens, may be supposed to have twelve inches to a foot; and is still very gener- T had its origin in the observation of ally employed in wholesale business, extend- the celestial phenomena, there being twelve ing to the second and even to the third term months or lunations commonly reckoned in of the progression. Thus, twelve dozen, or a solar year. The Romans likewise adopted 144, make the long hundred of the northern the same number to mark the subdivisions of nations, or the gross of traders; and twelve their unit of measure or of weight. The scale times this again, or 1728, make the double or appears also in our subdivisions of weights great gross. A Duodecimal Scale s already explained, any number system. Second, in naming numbers by any A may be made the basis of a system of system, we give independent names up to the numeration and notation. The decimal basis base, and then reckon by groups, using the is a mere accident, and in some respects an simple names to number the groups. Bearing unfortunate one, both for science and art. The these principles in mind, we are ready to un- duodecimal basis would have been greatly su- derstand Numeration, Notation, and the Fun- perior, giving greater simplicity to the science, damental Rules in Duodecimal Arithmetic. and facilitating its various applications. In Numeration.—In naming numbers by this chapter it will be explained how arith- the duodecimal system, we would first name metic might have been developed upon a the simple numbers from one to eleven, and duodecimal basis. then, adding one more unit, form a group, and In order to make the matter clear, I call name this group twelve. We would then, as attention to two or three principles of numera- in the decimal system, use these first names tion and notation. First, the bases of numera- to number the groups. Naming numbers in tion and notation should be the same; that is, this way, we would have the simple names, if we write numbers in a duodecimal system, one, two, three, etc., up to twelve. Continuing we should also name numbers by a duodecimal from twelve, we would have one and twelve, ∗Originally published in The Philosophy of Arithmetic as Developed from the Three Funda- mental Processes of Sythesis, Analysis, and Comparison, published by Sower, Potts & Company, Philadelphia, 1104 (1876.), by the same author. It is made available in this newly typeset, standalone format by the Dozenal Society of America, 11EX (2014.) (http://www.dozenal.org). Text courtesy of Google Books. 1 two and twelve, three and twelve, etc., up to cording to a duodecimal system could be eas- twelve and twelve, which we would call two ily applied. Were we actually forming such a twelves. Passing on from this we would have system, the simplest method would be to in- two twelves and one, two twelves and two, etc., troduce only a few new names for the smaller to three twelves, and so on until we reach groups, and then take the names of the higher twelve twelves, when we would form a new groups of the decimal system, with perhaps a group containing twelve twelves, and give this slight modification in their orthography and new group a new name, as gross, and then pronunciation, to name the higher groups of employ the first simple names again to num- the new scale. Thus, million, billion, etc., ber the gross. In this way we would continue could be used to name the new groups with- grouping by twelves, and giving a new name out any confusion, as they do not indicate to each group, as in the decimal scale by tens, any definite number of units to the mind, but as far as is necessary. merely so many collections of smaller collec- These names, in the duodecimal system, tions. Indeed, even the word thousand, with a would naturally become abbreviated by use, modification of its orthography, say thousun, as the corresponding names in the decimal might be used to represent a collection of system. Thus, as in the decimal system ten twelve groups, each containing a gross, with- was changed to teen, we may suppose twelve out any confusion of ideas. Their etymolog- to be changed to teel, and omitting the “and” ical formation would not be an objection of as in the common system, we would count any particular force, as no one in using them one-teel, two-teel, thir-teel, four-teel, fif-teel, thinks of their primary signification. These six-teel, etc., up to eleven-teel. Two-twelves terms are not suggested as the best, but as might be changed into two-tel, or twen-tel, cor- the simplest in making the transition from responding to two-ty or twenty, and we would the old to the new system. It will also be no- continue to count twentel-one, twentel-two, ticed that our departure in the decimal scale etc. Three-twelves might be contracted into from the principle of the system, by using the three-tel or thirtel, corresponding to three-ty or terms eleven and twelve, would facilitate the thirty of the decimal system; four-twelves to adoption of a duodecimal system. fourtel, five twelves to fiftel, etc., up to a gross. To illustrate the subject more fully, let us Proceeding in the same manner, a collection adopt the names suggested, and apply them to of twelve gross would need a new name, and the scale. Naming numbers according to the thus on to the higher groups of the scale. method explained, we would have the names In this manner, the names of numbers ac- as indicated in the following series: one oneteel twentel-one one gross and one two twoteel twentel-two one gross and two three thlrteel twentel-eight two gross and five four fourteel twentel-eleven six gross and seven five fifteel thirtel-one ten gross and eight six sixteel fortel-two eleven gross am nine seven seventeel fiftel-six one thousun eight eighteel sixtel-eight one thousun and five nine nineteel seventel-nine one thousun four gross ten tenteel tentel-ten and seven eleven eleventeel eleventel-eleven two thousun seven gross twelve twentel one gross and fortel-one 2 Notation.—The writing of numbers by the character Φ and eleven by Π. the duodecimal system would be an immediate These characters, with the zero, would be outgrowth of the method of naming numbers combined to represent numbers in the duodec- in this system. As in the decimal system of imal scale in the same manner as the nine notation, it would be necessary to employ a digits represent numbers in the decimal scale. number of characters one less than the number Thus, twelve would be represented by 10, sig- of units in the base, besides the character for nifying one of the groups containing twelve; 11 nothing. Since the group contains twelve units, would represent one and twelve, or oneteel; 12 the number of significant characters would be would represent two and twelve, or twoteel; 13 eleven—two more than in the decimal system. would represent thirteel; 14, fourteel; 15, fif- For these characters we should use the nine teel, etc. Continuing thus, 20 would represent digits of the decimal system, and then intro- two twelves, or twentel; 21, twentel-one; 23, duce new characters for the numbers ten and twentel-three, etc. The notation of numbers eleven. To illustrate, we will represent ten by up to a thousun may be indicated as follows:— one, 1 twelve, 10 thirtel, 30 two, 2 oneteel, 11 thirtel-two, 32 three, 3 twoteel, 12 thirtel-five, 35 etc., etc. twentel, 20 thirtel-ten, 3Φ nine, 9 twentel-one, 21 thirtel-eleven, 3Π ten, Φ twentel-ten, 2Φ one gross, 100 eleven, Π twentel-eleven, 2Π one thousun, 1000 Extending the series as explained above, we should have the following notation table:— Trillyuns. Gross of Billyuns. Twelves of Billyuns. Billyuns. Gross of Millyuns. Twelves of Millyuns. Millyuns. Gross of Thousuns. Twelves of Thousuns. Thousuns. Gross. Twelves. Units. 8 5 Π 4 6 Π 8 5 7 Φ 3 6 5 From the explanation given it is clearly quired, as all of its methods and principles seen that a system of duodecimal arithmetic would remain unchanged. Indeed, so readily might be easily developed, and readily learned could the change be made, that in view of the and reduced to practice. Employing the names great advantages of the system, one is almost which I have indicated, or others similar to ready to believe that the time will come when them, the change from the decimal to the scientific men will turn their attention seri- duodecimal system would be much less diffi- ously to the matter and endeavor to effect the cult than has usually been supposed. It would change. be necessary to learn the method of naming Fundamental Operations.—In order and writing numbers, which we have seen is to show how readily the transition could be very simple, and a new addition and multipli- made, I will present the method of operation cation table, from which we could readily de- in the fundamental rules. We would proceed rive the elementary differences and quotients. first to form an addition table containing the The rest of the science would be readily ac- elementary sums, which, as in the decimal 3 system, we would commit to memory.
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