XU CONTENTS. 



32. Conversion of arc into time 162 



33. Conversion of time into arc 163 



34. Conversion of mean time into sidereal time 164 



35. Conversion of sidereal time into mean time 165 



36. Length of 1° of the meridian at different latitudes (in metres, 



statute miles, and geographic miles) 166 



37. Length of 1° of the parallel at different latitudes (in metres, stat- 



ute miles, and geographic miles) 167 



38. Interconversion of nautical and statute miles 168 



39. Continental measures of length, with their metric and English 



equivalents 168 



40. Acceleration (g) of gravity on surface of earth and derived func- 



tions .169 



41. Linear expansions of principal metals 170 



42. Fractional change in a number corresponding to a change in its 



logarithm 170 



APPENDIX. 



Numerical Constants , 171 



Goedetical Constants 171 



Astronomical Constants 172 



Physical Constants 172 



Synoptic conversion of English and Metric Units — 



English to Metric 173 



Metric to English 174 



Dimensions of physical quantities 175 



INDEX 177 



