Oct., 1907. METEORITE StupiEs IJ — FARRINGTON. 113 
dimensions of the mass would have been if the two parts were joined 
along the fractured surfaces, the two full-sized models of these masses 
in possession of the Museum were joined in this way. The resulting 
form is shown in the accompanying plate. (Plate XX XI.) Itisseen 
to be broad and tabular with irregular outline. Along the line where 
disruption took place there was an evident constriction. The corre- 
spondence between the broken surfaces is such as to leave little 
‘doubt that they were once joined. The dimensions of the mass so 
formed are: Length 12 feet (3.6 meters) and width 7 feet (2.1 
meters}; The weight of this mass would have totaled about 21 tons 
(20,881 kgs.). It would be of interest to know which surfaces of the 
two masses lay uppermost when found, but no record seems to have 
been made of this point. There is a marked difference in the pittings 
on the two broad surfaces and they correspond on the two masses 
when joined. Thus pittings on the side shown in the accompanying 
plate are deeper and narrower than those on the opposite side. The 
indications are therefore that the side shown in the accompanying 
plate was the front side in falling. 
As the writer is not aware that any photographs of the two original 
masses have ever been published, the accompanying cuts (Plates 
XXXII-XX XIII) from photographs made by him in 1896 are pre- 
sented. These show the masses as they are installed in the National 
School of Mines in the City of Mexico. With them, as installed, are 
placed the Concepcion (Adargas) and Zacatecas meteorites. . The 
large Chupaderos and the Concepcion masses are installed at one side 
of the entrance of the School of Mines (Plate XX XII) and the smaller 
Chupaderos and the Zacatecas masses at the other side of the entrance 
(Plate XX XIIT). In* Plate XXXIV is shown the Morito (San 
Gregorio) mass which is likewise installed at the School of Mines, and 
of which a photograph was made by the writer at the same time. 
This is a beautifully oriented meteorite and, as will be seen, has been 
mounted in the position it assumed when falling. 
IRON CREEK. 
A cast of this meteorite recently received by the Museum (Museum 
No. Me 763) through the kindness of the Geological Survey of Canada 
affords an opportunity for the study of some features which have not 
previously received description. The meteorite is remarkable for 
its orientation, the characters of front and rear sides being shown very 
plainly. In perfection of form in this respect it equals the Cabin 
Creek meteorite, which in general shape it resembles. In previous de- 
