dwarf cone near the foot of the “Goma Pass,” we found the usual outlying huts for porters dying of small-pox, and an old kraal, which we made comfortable for the night. In the extensive prospect around, the little beehive villages of the Wakaguru and the Wakwivi, sub-tribes of the Wasagara, peeped from afar out of the forest nooks on the distant hill-folds. The people are rich in flocks and grain, but a sad experience has taught them to shun intercourse with all strangers, Arabs and Wasawahili, Wamrima and Wanyamwezi. In happier days the road was lined with large villages, of which now not a trace remains. A Boiling Point Thermometer by Cox, the gift of Lieut.-Colonel Hamerton, and left with him by Captain, now Admiral Smyth, F. R. G. S., who had used it in measuring the Andes, had been accidentally broken by my companion at Cha K’henge. Arrived at Rufuta, I found that a second B. P. by Newman, and a Bath-Thermometer by the same maker, had been torn so violently from their box that even the well-soldered handles were wrenched off. But a few days afterwards our third B. P. was rendered useless by the carelessness of Gaetano. Thus, of the only three really accurate hypsometrical instruments which we possessed,--the Barometer had come to grief, and no aneroid had been sent from Bombay--not one was spared to reach the Lake. We saved, however, two Bath-Thermometers marked Newman, and Johnson and Co., Bombay, which did good service, and one of which was afterwards corrected by being boiled at sea-level. I may here observe that on such journeys, where triangulation is impossible, and where the delicate aneroid and the Mountain Barometer can scarcely be carried without accident, the thermometer is at present the traveller’s stand-by. It abounds, however, in elements of error. The elasticity of the glass, especially in a new instrument, causes the mercury to subside below the graduated scale. The difference of level in a covered “shaving-pot” and in an open pan exposed to the wind, will sometimes amount to 1° F. = 500 feet: they therefore are in error who declare that any vessel suffices for the purpose of boiling. Finally, in all but the best instruments the air is not thoroughly expelled from the tube: indeed some writers, Dr. Buist, for instance, actually advise the error.