118 DAVEXPORT ACADEMY OF NATURAL SCIEXCES. 



No. II. From the same locality. 



Physical characters : Compact: granular; color, dark blue; glazing upon 

 the outer surface not so pronounced as in the preceding, although the inner 

 surface shows it very perceptibly. Decoration upon outer surface consists 

 of pale black serrated lines. Hardness, 3.5. Sp. gr., 2.438. 

 Ciiiupoifitio)) : Chlorid of sodium. .23 



Fotas.sa, .16 



Alumina, .08 



Oxide of iron, .56 



Carbonate of lime, silica, etc.. 98.97 



Thickness of specimen, .13 of an inch. In this case the vessel was, 

 according to the pieces, about eig-ht inches high, originally with an 

 opening less than four inches in diameter, and would scarcely present 

 the inner perceptibly glazed surface from intentional design in nian- 

 ufactuie, for that were scarcely possible. 

 No. 111. From Santo Domingo. 



Phi/sical characters. Rather porous; fawn-colored in middle of specimen, 

 the inner and outer fourths being of a reddish tinge, due to o.xidation of iron; 

 no glazing; contain.'^ minute granules of silica ; colored decorations, brown. 

 Hardness. 2.H: sj). gr.. 2.3()K. 



Ciii/ipiixif/i/n : Clilorid of sodium. ,24 



Potassa. .15 



Alumina. .02 



Oxide of iron. .15 



Carl), of lime, silica, (jrg. matter, etc., 99.44 

 If any glazing was present originally, it was not perceptible at this 

 time, although no indications of wear were noticeble. The color- 

 ing matter upon this specn'men consisted of carbonate of iron, and it 

 would be interesting to know how long a period was consumed in the 

 change from an oxide. .Moitar iVoui a Ivouian wall was found to con- 

 tain carbonate of lime, and in anotluM' instance a bi-carbonate, the re- 

 union of the carbonic aciil witli tin- lime having taken place during 

 the lapse of centuries.* 'i'hi- black lint-s applied to this pottery are 

 supposed to have consist'd of charcoal Hnely ground and mixed with 

 clay. Iron in the form of an earthy oxide is not of common occur- 

 rence in this region, and it njay be tliat the material employed was 

 from the "red ochre mines"" mentioned bv Vaigas as l)eing located in 

 the Cierro Colorado, (Red Mountain). "It is said to be ten davs 

 travel from Aguatubi, on a high steep mountain, ditliciilt of access. It 

 required a dav or two to go up and get tiie ocin-o out of the earth. 



* 1 was recently so informed by Dr. F.M. Endlich of the Smithsonian lusti 

 tution, who has made analvses of the mortar above slated. 



