THE MICROBIOLOGY OF THE ATMOSPHERE 



MEASURES OF CAPACITY— (6as£(/ on i Imperial gallon = 4-546 litres) 



I American gallon — 3-785 litres 

 I litre — 1,000 cc. 



British to Metric Metric to British 



I pint (pt.) — 0-368 litre i millimetre (ml. = cc.) — 0-061 cu. in 



I quart (qt.) — -2 pints — 1-13 litres i centilitre (cl.) — 10 ml. — o-6io cu. in. 



I gallon (gal.)— 4 quarts— 4-546 litres i litre (1.)— 100 cl. — 1-760 pints 



Temperature 



0° Centigrade ( = Celsius) = 32° Fahrenheit 



The following formulae connect the two major thermometric scales : 



Fahrenheit to Centigrade : °C = 5/9 (°F — 32) 



Centigrade to Fahrenheit : °F = (9/5 °C) + 32 



Additional Conversion Factors for this Book 

 Volumes 



I cubic metre = 1000 litres = i million cu. centimetres 

 = 35"3 cubic feet 

 I cubic foot = 28-32 litres 

 Velocity 



I metre per second = 2-24 miles per hour 

 = 197 feet per minute 

 I foot per second = 0-305 metres per second 

 = 0-68 miles per hour 

 I mile per hour = 0-447 metres per second 

 = 1-1465 feet per second 

 Calculation of area dose 



velocity of wind volume through i cm.- wind run 



I metre/sec. 8-64 cu. m. 86-4 km./day 



0-116 metres/sec. i-o cu. m. lo-o km./day 



Altitude above ground 



1000 metres = 32S1 feet 

 1000 feet = 304-8 metres 



216 



