Vista previa del material en texto
ABBREVIATIONS mm millimetre ¡i micron—10 3 mm fj,2 square micron m[ji mill imicron—10- 6 mm  Angstrom—10~7 mm kg kilogram g gram mg milligram—10~3 gram ¡xg microgram—10~6 gram 1." litre ml millilitre vol. volume M mole (one gram molecule) per litre hr hour(s) min minute(s) sec second(s) C degree centigrade V volt mV millivolt—10- 3 volt dB decibel cps cycles p¿r second SPL sound pressure level ci interplanar spacings (in a crystal) xii