MINDELEFF.] CHIMNEYS. 17/5) 
A modification of the interior fireplace designed for cooking the thin, 
paper-like bread, known to the Spanish-speaking peoples of this region 
as “ guyave,” and by the Tusayan as ‘“ piki,” is common to both Cibola 
and Tusayan, though in the former province the contrivance is more 
carefully constructed than in the latter, and the surface of the baking 
stone itself is more highly finished. In the guyave oven a tablet of 
carefully prepared sandstone is supported in a horizontal position by 
two slabs set on edge and firmly imbedded in the floor. A horizontal 
flue is thus formed in which the fire is built. The upper stone, whose 
surface is to receive the thin guyave batter, undergoes during its orig- 
inal preparation a certain treatment with fire and pifion gum, and _per- 
haps other ingredients, which imparts to it a highly polished black 
finish. This operation is usually performed away from the pueblo, near 
a point where suitable stone is found, and is accompanied by a ceremo- 
nial, which is intended to prevent the stone from breaking on exposure 
to the fire when first used. During one stage of these rites the strictest 
silence is enjoined, as, according to the native account, a single word 
spoken at such a time would crack the tablet. 
When the long guyave stone is in position upon the edges of the 
back and front stones the fire must be so applied as to maintain the 
stone at a uniform temperature. This is done by frequent feeding with 
small bits of sage brush or other fuel. The necessity for such economy 
in the use of fuel has to a certain extent affected the forms of all the 
heating and cooking devices. Fig. 69 illustrates a Sichumovi piki 
Fia. 69. Piki stone and chimney hood in Sichumovi. 
stone, aud Fig. 70 shows the use of the oven in connection with a 
cooking fireplace, a combination that is not uncommon, The latter ex- 
