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By the latest intelligence from Lieutenant Cameron, dated Ujiji, 28th February, 1874, the mean of many observations for altitude of the Tanganyika Lake taken with mercurial barometer, aneroids, and boiling water thermometers, gives 2,573 feet above the sea-level. The corrected altitude of the Albert N'yanza, taken by me at Vacovia, N. lat. 1 degree 14', March 14, 1864, is 2,720.
The mercurial barometer reading by verniers to three places of decimals was set up and read, and the two aneroids were adjusted to read with it. These two aneroids perhaps deserve a word. Aneroid A was a three-inch, three-circle instrument, the invention of Colonel Watkins, of the British army, of range-finder fame.
It looked possible to reach the summit in one more day's climb from here. The aneroids now differed by over five hundred feet. Leaving me to pitch the tent, the others went back to the cache to bring up some of the supplies. Due to the fact that we were carrying loads twice as heavy as those which Tucker and Coello had first brought up, we had not passed their cache until to-day.
During the morning I set up the barometers and took a series of observations. It was pleasant to note that the two new mountain aneroids registered exactly alike. All the different units of the cargo that was to be taken up the mountain then had to be weighed, so that they might be equitably distributed in our loads the following day. We had two small kerosene stoves with Primus burners. Our grub, ordered months before, specially for this climb, consisted of pemmican in 8 1/4-pound tins, Kola chocolate in half-pound tins, seeded raisins in 1-pound tins, cube sugar in 4-pound tins, hard-tack in 6 1/2-pound tins, jam, sticks of dried pea soup, Plasmon biscuit, tea, and a few of Silver's self-heating "messtins" containing Irish stew, beef
Tucker's aneroid read more than a thousand feet higher, 22,550 feet, but even this fell short of Raimondi's estimate of 22,775 feet, and considerably below Bandelier's "23,000 feet." This was a keen disappointment, for we had hoped that the aneroids would at least show a margin over the altitude of Mt. Aconcagua, 22,763 feet. This discovery served to dampen our spirits still further.
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