566 



ILL USTRA TI VE EXPERIMENTS 



68,971. 

 14-7. 



1-0132 X 106. 



043. 



0-01602. 



10'. 



4-19. 



0-4266. 



0-1382. 



1-356. 



0-102. 



746. 



76-04. 



Pressure . . Pounds per square inch to dynes per 



square centimetre .... 



Atmospheres to pounds per scpiare inch . 

 Atmospheres to dynes per square centi- 

 metre ...... 



Head of water in feet to pounds per square 

 inch ...... 



Density . . Pounds per cubic foot to grams per cubic 



centimetre ..... 



Energy . . Joules to ergs (1 erg = 1 dyne per second) 



Gram-calories to joules 

 Gram-calories to kilogram-metres . 

 Foot-pounds to kilogram-metres 

 Foot-pounds to joules .... 



Power . • (1 watt = 1 joule per second = 1 volt- 



ampere.) 

 Watts to kilogram-metres per second 

 Horse-power to watts .... 



Horse-power to kilogram-metres per second 

 1 B.T.U. = power of 1 kilowatt for one hour. 

 = 3-6 X 10^ joules. 

 = 8-59 X 10^ gram-calories. 

 German candles to English candles . . 1-25. 



Thermometers. To convert degrees F. into degrees C, deduct 32 and 

 multiply by 5/9. To convert degrees C. into degrees F., multiply by 9/5 

 and add 32. 

 1 litre of oxygen at 0° C. and 760 mm. weighs 1-429 grams. 

 1 litie of carbon-dioxide at 0° C. and 760 mm. weighs 1-965 grams. 

 1 litre of nitrogen at 0° C. and 760 mm. weighs 1-254 grams. 

 1 litre of air at 0° C. and 760 mm. weighs 1-292 grams. 

 1 litre of hydrogen at 0° C. and 760 mm. weighs 0-900 gram. 

 1 litre of water vapour at 0° C. and 760 mm. weighs 0-8132 gram. 

 1 gram of protein = 966-3 c.c. oxygen intake and 773-9 c.c. of carbon-dioxide 



output. 

 1 gram of fat ~. 2019-3 c.c. oxygen intake and 1427-3 c.c. of carbon-dioxide 



output. 

 1 gram of starch = 828-8 c.c. oxygen intake and 828-8 c.c. of carbon-dioxide 



output. 

 1 gram of urinary nitrogen = 26-51 Calories. 



= 5-91 litres (8-45 grams) of oxygen. 

 =E 4-75 litres (9-35 grams) of carbon-dioxide. 

 IjU. = 1 micromillimetre = 10"^ mm. 

 Ifxix = 1 millimicrometre = 10"^ mm. 

 1 A = 1 Angstrom unit = 0-1 /x/x = 10~' mm. 



