W. J. HOFFMAX.- — AXTIQUITIES OF NEW MEXICO AXD ARIZOXA. 117 



sorbed in smoothing the vessel previous to dryini;-. would contribute 

 sufficient saline matter to produce a visible effect, if the salt had not 

 previously existed in the clay. In addition, it is ascertained that the 

 salt is present in the body ot" the frafj-ments of pottery as well as in 

 the glazing, thus verifying to some extent the belief already enter- 

 tained. Another fact which supports the statement is that in several 

 instances glazing was present upon the incised or punctured varieties, 

 and upon close examination was found to exist in the different inden- 

 tations as well as upon the ordinary untouched surface. The reason 

 that some specimens present more glazing than others, (and this, by 

 the way, generally occurs upon the thickest fragments,) is, (.m ac-count 

 of the proportionately greater anK)unt of saline matter contained 

 therein, and brought to the surface as an incrustation by evaporation 

 and drying, being thus directly exposed to the heat in baking, and 

 also, perhaps, that these specimens may have received more- surface 

 washing to present a more vuiiform appeai'ance. 



Analyses made of a large mimber of varying specimens sujjport the 

 above proposition, and a few e\ain[)les are given below, to illustrate 

 the relative proportions of several ingredients that were more [)artic- 

 ularlv sought for. 



No. I. From a clift-dwc'lling in the (anon of tin- Rio .Maucos. 



Physiral r/uinn-terx : Compact; inner surface smooth and of a ])alo ))luisli 

 or ashy tint; externally, fawn-colored, strongly jrlazed, tlie ornamentation 

 consistinij of black lines crossing- the base lines at right angles. The body 

 of the specimen contains numerous granules of silica and spicules of horn- 

 blende. Hardness, 3; sp. gr., 2.372. 

 Couipoxitii'ii : Chlorid of sodium, .38 



Potassa, .12 



Alumina, .03 



Oxide of iron, .78 



Carbonate of linic silica, etc., OS.(>f» 



Carefully removing the g]aze<1 surface from other [pieces of the 

 same vessel, the body of the material furnished the following : 

 Chlorid of sodium, .2() 



Potassa, .13 



Alumina. trace 



Oxide of iron, .76 



Carbonate of lime, silica, etc., 08.85 



Small particles of the baked clay were lost by adhering to the 

 glazed scales, if they niay be so termed, as that surface was too thin 

 to remove withcjut affecting the material to which it adhered. Natu- 

 ral thickness of the piece, .37 of an inch. 



