The Meter, for 

 LENGTH 



THE METRIC SYSTEM. 



Units. The most commonly usfd divisions and multiples. 



Centimeter (cm),- i/ioo meter; Milliineter (mm), 

 l/iooo meter; Micron (/(), i/iooo millimeter. The 

 micron is the unit in micrometry. 

 Kilometer, looo meters; used in measuring roads and other 

 long distances. 



Thf Tram for i ^^'^^'S''""^ ("^g)' i/iooo gram. 



' - Kilos^ram, lOOO grams, used for ordinary masses, like 



^^'^-^•^"■^ ( groceries, etc. 



The Liter, for j Cubic Centimeter (cc), i/iooo liter. This is mc^re 



CAPACITY. . .. ( common than the correct form, Milliliter. 



Divisions of the units are indicated by Latin prefixes: deci, i/io; centi, 

 l/ioo; /;/////, i/iooo. 



Multiples are designated by Greek prefixes: deka, lo times; hecto, lOO 

 times; kilo, lOOO times; myria, 10,000 times. 



TABLE OF METRIC AND ENGLISH MEASURES. 



Meter = 100 centimeters, 1000 millimeters, 1,000,000 microns, 39.3704 

 inches. 



Millimeter (mm) =: 1000 microns, i/io millimeter, i/icoo meter. 1/25 inch, 

 approximately. 



Micron (//) (unit of measure in micrometry) = 1/1000 mm, i/inooooo me- 

 ter {0.000039 inch), 1/25000 inch, approximately. 



Inch (in.) = 25.399772 mm (25.4 mm. approx.). 



Liter = 1000 milliliters or 1000 cubic centimeters, i quart (approx.). 



Cubic centimeter (cc or cctm) = i/iooo liter. 



Fluid ounce (8 fluidrachms) = 29.578 cc (30 cc, approx.). 



CIram — 15.432 grains. 



Kilogram (kilo) = 2.204 avoirdupois pounds (2l pounds, approx.). 



Ounce Avoirdupois (437i grains) = 28.349 grams / (30 grams, 



Ounce Troy or Apothecaries' (480 grains) = 31. 103 grams )" approx. ). 



TEMPERATURE. 



To change Centigrade to Fahrenheit: (C. X |) +32 = F. For example, to 

 find the equivalent of 10° Centigrade. C. = 10°, (10° X |) + 32 = 5°° ^■ 



To change Fahrenheit to Centigrade: (F. — 32°) X | = C. For example.to 

 reduce 50 Fahrenheit to Centigrade, F. = 50°, and (56°— 32°) x | — 10° C. ; 

 or - 40' Fahrenheit to Centigrade, F. = —40% (- 4°°— 32°) = - 72°, 

 whence — 72" X » = - 4°° C. 



— From "■The Microscope" {by S. H. Gage) by permission. 





