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to it as you need it. Gradually you will become so familiar with this system that "uuf" will instantly bring to your mind the value, one million millionth of a farad.
     Other units of electrical measurement are the henry, the ohm, the volt, the ampere. From the table we know that one million microfarads is equivalent to one farad; that

385,000	cycles	=	385	kilocycles (kc.)
37,000,000	ohms	=	37	megohms
.00000245	henries	=	245	microhenries (µh)

     Strictly speaking, tables of this sort present facts which are known to be true in regular order. No one ever questions the fact that 8 X 7 = 56 or that there are 12 inches in every foot. These relations hold true under all conditions.
     The Radio-Trician and the experimenter borrow the idea of tables, however, and express various relations in tabular form

TABLE NO. 6

Year	Average sets sold per week
1925	3
1926	5
1927	6
1928	6
1929	10
1930	18

(in a table-like form), to show comparative values, in such a way that they will create very definite pictures in the mind of the person interested.
     An example of facts presented in tabular form can be taken from business where this particular form of short cut is frequently used. Let us suppose you are in the Radio business-- you have been in the Radio business since 1925. Suppose the manufacturer whose sets you are handling, asks you to tell him how many sets you have sold on an average per week during each of the past six years. You look up your records and you find that during 1925 you sold an average of 3 sets per week; in 1926, 5 a week; in 1927, 6 a week; in 1928, no gain and only 6 were sold each week on an average; in 1929, 10 a week, and in the year 1930, which was a banner year, your sales averaged 18 a week.

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Content	©1931, National Radio Institute
Webpage	©1997, Nostalgia Air
Transcriber	Richard Lancaster