148 
Pror. T. EGLeEston said the mineral was Pectolite, which 
occurs sometimes thus altered. Apophylite is often found 
passing into Pectolite and in fact all of these zeolites are 
very liable to decomposition. 
The President, Pror. J. 8S. NEwBERRY exhibited a series 
of beautifully preserved Fossil Leaves from the Cretaceous Sand- 
stone of Fort Harker. This sandstone, he said, was the 
lowest member of the Cretaceous series in the United States, 
the equivalent of the Raritan sands and clays in New 
Jersey, of the Upper Green-sand of the Old World. This * 
was the lowest horizon where angiospermous leaves had 
been found, but here they were quite numerous, and repre- 
sented, perhaps, a hundred species and, as the specimens on 
the table demonstrated, formed the foliage of trees of large 
size and luxuriant growth. Some of these leaves were a foot 
or more in diameter. 
He also exhibited a beautiful series of Fossil-Plants from 
the Miocene Tertiary of Oregon, collected by Rev. Thomas 
Condon, remarking that the deposit from which they came 
contained twenty or thirty species which were new, and 
beautifully preserved. A few others, such as Sequora Langs- 
dorfii connected this deposit with other Miocene tertiary 
plant beds and determined its age. The collection was made 
by Mr. Condon at great trouble and risk and reflected great 
eredit upon his scientific enthusiasm. 
The rest of the evening was occupied by Mr. J. G. Hocu- 
STETTER, who has spent some time in the island of Cuba, in 
- charge of Copper mines, the mode of working which and the 
yield he detailed. The principal fact which he treated of, 
was the employment of coolie labor in these mines. They 
there work along with negroes, and so good opportunities were 
presented for comparing the capabilities of the two races, and 
it was decidedly in favor of the coolie. In fact the results 
were, on the whole, very encouraging. Some of these mines 
are very deep, having been worked for over thirty-five years 
and the heat of the air down as low as two hundred fathoms 
