The vertical threads, as shown in the figure, are the warp threads; the coarser thread which is inserted transversely between these is the yarn or weft. The three rods in the center of the blanket are lease rods, which are introduced among the threads of the warp to separate them and thus facilitate the insertion of the weft thread. These rods are each passed in front of one warp thread and behind another, alternately, across the whole warp, and between each rod the threads are brought from the back of one to the front of the next, and _vice versa_. The bar held in hands of the weaver serves as a batten for driving or beating the weft thread into the angle formed by the crossed warp threads. This loom resembles in principle the ancient Egyptian, Grecian, and French looms which are described on pages 55 to 62 of "The History and Principles of Weaving by Hand and Power," by A. Barlow, London, 1878, and on pages 41 to 45 of the "Treatise on Weaving and Designing of Textile Fabrics," by Thomas E. Ashenhurst, Bradford, England, 1881. See also pp. 200 to 208, Vol. II, of the "Cotton Manufacture of Great Britain," by A. Ure, London, 1861. COLLECTIONS FROM CUYAMUNQUE. ARTICLES OF STONE. _RUBBING STONES._ (Used as rubbers in grinding corn on metates.) 1-3. 1, (46506); 2, (46507); 3, (46517). Basalt. 4, (46510). Sandstone. 5, (46512). Conglomerate. 6-9. 6, (46513); 7, (46514); 8, (46515); 9, (46516). Mica schist. 10-11. 10, (46518); 11, (46529). Of hornblende schist; these are elongate and intended to be used with both hands. 12-13. 12, (46508); 13, (46567). Quartzite metates. 14-15. 14, (46509); 15, (46511). Sandstone metates, the latter but little used and almost flat. 16, (46551). Rubbing stone of andesite. 17-24. 17, (46555); 18, (46556); 19, (46557); 20, (46558); 21, (46561); 22, (46563); 23, (46569); 24, (46559). Small smoothing stone mostly of quartzite, one or two only of basalt. These are bowlders weighing from one to three pounds, rounded by natural agencies, and selected by the natives to be used for smoothing and polishing purposes. When much used they are worn down flat on one side, the side used being worn off, just as the rubbing stone in the old process of preparing paint. 25-26. 25, (46519); 26, (46520). Unfinished celts of basalt. 27, (46521). Crude hoe or adze of mica schist. 28, (46522). Schist stone with groove for smoothing arrow shaft, and hole for rounding point. 29-31. 29, (46523); 30, (46524); 31, (46525). Crude stone implements, supposed to be used for digging. 32-34. 32, (46526); 33, (46527); 34, (46528). Very crude stone implements, probably used for pounding. 35, (46530). Double-handled baking stone; basalt. The use of stones of this kind will be more particularly noticed hereafter. 36, (46531). Broken rounded mortar; basalt.