. Annual report. 1st-12th, 1867-1878. a fire is built into it until per-fectly heated ; the mezcal is then piled into this receptacle, covered overwith stones and earth, when another fire is built over the surface andkept up until the cores are thoroughly cooked. This may last fromthree to fifteen days, the time depending upon the quantity to be pre-pared. When the roots have been thoroughly cooked they are of asemi-gelatinous consistence; they are then crushed in vessels made for * Often a scum of organic matter is found around the margin of alkali lakes, whichresults, in part, from dead fish
. Annual report. 1st-12th, 1867-1878. a fire is built into it until per-fectly heated ; the mezcal is then piled into this receptacle, covered overwith stones and earth, when another fire is built over the surface andkept up until the cores are thoroughly cooked. This may last fromthree to fifteen days, the time depending upon the quantity to be pre-pared. When the roots have been thoroughly cooked they are of asemi-gelatinous consistence; they are then crushed in vessels made for * Often a scum of organic matter is found around the margin of alkali lakes, whichresults, in part, from dead fish, who have come down from the streams and were over-come hy the alkalinity and peritked. I presume this to be one reason, as skeletons arenot of uncommon occurence. tSee also Rep. Explor. Exped. (Rocky Mts. 1842, Oregon and North Cal. 1843-44.)By Bvt. Capt. J. C. Fremont, 1845, p. 154. t Commerce of the Prairies, Gregg, New York, 1844, vol. ii, p. 296. $ See also Pac. R. R. Rep., vol. iv, p. 9. U. S. Geological Survey. Plate
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