LIST OF CONVERSION TABLES (CONT'D) 



Table 



Number ^age 



16 WIND SPEED - Conversion from feet per second 



to knots • 50 



17 WIND FORCE - Conversion from knots, meters per 



second, kilometers per hour, and miles per 



hotir, to the Beaufort wind scale 51 



18 ATMOSPHERIC PRESSURE - Conversion from inches of 



mercury to millibars 52 



19 ATMOSPHERIC PRESSURE - Conversion from millimeters 



of mercury to millibars 53 



20 TEMPERATURE - Conversion from Fahrenheit to Centigrade. 56 



21 PRESENT WEATHER - WMO Code ^+501 for recording 



present weather. 



6h 



22 PRESENT WEATHER - Conversion from Beaufort weather 



notation to WMO Code if 501 65 



23 PRESENT WEATHER - Conversion from I936 International 



Meteorological Organization to the WMO Code ii501.. 66 



2k PRESENT WEATHER - WMO Code ^6TT for recording 



present weather TO 



25 CLOUD TYPE (genus) - WMO Code O5OO for recording 



cloud type (genus ) 7^+ 



26 CLOUD AMOUNT - WMO Code 2700 for recording 



cloud amount • 75 



27 VISIBILITY - WMO Code ij-300 for recording visibility 



at surface 7° 



28 PRECISION OF MEASUREMENT CODE 77 



29 SALINITY - Conversion from chlorinity to salinity %o, .,. 78 



30 OXYGEN - Conversion from milligrams per liter to 



milliliters per liter (nTP) 93 



viii 



