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10 OEIMTI IS/I ETE R RULE. 



The upper edge is in millimeters, the lower in centimeters and half centimeters. 



IE METRIC SYSTEM. 



UNITS. The most commonly used divisions and multiples. 



tttp TtrwTp-w vr\-a {Centimeter (cm.), i-iooth Meter; Millimeter (m.m.), i-ioooth Meter: Micron 



length l ^ ^' I_Ioootn Millimeter; the Micron is the unit in Micrometry (g 157). 



" {Kilometer, 100 Meters ; used in measuring roads and other long distances. 

 the gram for f Milligram (m.g.), i-ioooth gram. 



weight. . . . \ Kilogram, 1000 grams, used for ordinary masses, like groceries, etc. 

 the liter for f Cubic Centimeter (c.c), i-ioooth Liter. This is more common than the correct 



capacity. . . \ form, Milliliter. 



Divisions of the Units are indicated by the l^atin prefixes : deci, i-ioth ; centi, i-iooth ; Milli, 

 i-ioooth. 



Multiples are designated by Greek prefixes : deka, 10 times ; hecto, 100 times ; kilo, 1000 times ; 

 myria, 10,000 times. 



[This card is the size used for library catalogs.] 

 From Gage, the Microscope and Microscopical Methods, 



6th edition. Comstock Pub. Co., Ithaca N. Y. 



