100 ROCHESTER ACADEMY OF SCIENCE, [June 23, 
tion. This meteorite reached us in perfect condition and measured 
thirteen by nine inches (325x225 m. m.) and weighed ninety-four and 
one-half pounds, (43.4 kilos). 
We have run a gang of six saws through it, cutting it into five 
sections and two end pieces, revealing several large nodules of troilite, 
directly in the center of some of which, and entirely surrounded by the 
troilite, are nodules of iron. An etched surface of one of these sections 
is suggestive of a scotch plaid, so broad and straight are the markings, 
two sets of which cross each other at nearly right angles, while a third 
set crosses one of these at an angle of 12°. Some of the more promi-. 
nent lines of kamesite are about half an inch apart, and suggest very 
strongly, both by their direction and spacing, a relationship to the 
lines of small pittings on the outside, previously referred to. There 
are, however, in addition to the large nodules of troilite mentioned, 
great numbers of specks of some sulphide, of a lighter greyer 
color than the large troilites. These specks must, I think, be considered 
the true cause of the lines of pittings, as it is possible in a few cases to 
connect the two at the edges of the sections. The specks do not, how- 
ever, exhibit a like parallelism. 
The amount of time and strength of acid required to bring out the 
markings on this iron is in marked contrast to the quickness with which 
dilute acid acts upon the Hamilton Co., Puquios and Welland meteor- 
ites. When this iron is analysed we will perhaps have a few more facts 
to offer. 
THE LA PRIMITIVA METEORITE. 
This small siderite, weighing only six or eight pounds, was given 
to the Superintendent of the Nitrate works at La Primitiva, Salitra, in 
1888, by a native who found it near by. These works are situated in 
the desert of Tarapaca, 40 miles east of Iquique, Chili. When Prof. 
Ward visited this place in April, 1889, the Superintendent, Mr. J. F. 
Humberstone gave him a small piece weighing about an ounce, which 
is now in the Ward & Howell collection of meteorites. 
THE CALDERILLA METEORITE. 
, A small piece of this iron was given to Prof. Ward by Sefior 
Enrique Gigoux at Copiapo, in April, 1889. Seftor Gigoux obtained it 
from a friend now dead. It is claimed that this small iron weighing 
only a few ounces was seen to fall at Calderilla, a suberb of Caldera, 
Chih, in 1883. 
The Academy adjourned to the second Monday evening of October. 
