FOOTNOTES:
[1]The stories and fables given in [Appendix G] afford a striking commentary on the working of the existing system of so-called government in Marocco.
APPENDICES.
APPENDIX A.
Observations for determining Altitudes of Stations in Marocco.
By John Ball.
The instruments provided for the measuring of heights during our journey in Marocco were, in the first place, two mercurial barometers belonging to Sir J. Hooker, which were unfortunately left behind at the last moment by his attendant who had them in charge. Mr. Ball carried an aneroid barometer, by Secrétan of Paris, which, during many mountain journeys before and since, has performed very satisfactorily; and Mr. Maw had a small pocket aneroid of ordinary construction, not deserving of much confidence.
At Sir J. Hooker’s request, Mr. Carstensen, then British Vice-consul, and M. Beaumier, French Consul at Mogador, both recorded observations of the barometer and thermometer twice daily (at 10 A.M. and 4 P.M. ) during the period of our stay in and near to the range of the Great Atlas. Mr. Carstensen’s instrument was a mercurial barometer, apparently a moderately good instrument; but, inasmuch as it showed itself more sluggish than M. Beaumier’s instrument, and the amplitude of its variations was less considerable, its records do not appear to deserve equal confidence. On rendering the measurements into millimetres, and correcting both instruments so as to bring the indications to 0° C. at the sea level, the observations with the mercurial barometer fall short of those of the other instrument by a mean difference of 5·5 mm., the chief cause of the discrepancy being apparently due to the scale of the former being unduly low. Comparing corrected observations for ten days of very settled weather, during which the utmost range of either instrument did not exceed 2½ millimetres, we have the mean pressure
| By Carstensen’s instrument | = | 755·30 mm. |
| „ Beaumier’s „ | = | 760·80 mm. |