The few thermometrical observations made by Mr. Overweg differ partially from mine owing to the different situations we gave to our thermometers. I have always endeavoured to raise the thermometer five or six feet from the ground, and to prevent its being influenced by any object. I have always looked for the best shade. Overweg marks, under December 5, a quarter of an hour before sunrise, 46·4, and at sunset 66·2; under December 9, where I have made no observation, he gives 48·2 at sunrise, and 59 at sunset. December 11, he gives 38·3 half an hour before sunrise, and December 12, about the same time, 37·4.

END OF THE FIRST VOLUME.