GEOLOGICAL SOCIETY OF DUBLIN. 
153 
levels, varying as nmcli as a hundred feet. Of the four strata of hog, 
the lowest is of a heavy black kind. In the stratum over this, large 
stumps of trees are found, oak and yew in the shallower hogs, or nearer 
the higher lands; fir and alder in the deeper hogs, and over the flattest 
lands. 
The third stratum appears to he composed principally of heath, in 
some places giving place to hlack hog, in which iron ore is found abun¬ 
dantly. The fact of this iron ore having been “ arrested by animal- 
cuke” is alluded to, and its origin is referred, perhaps, to the iron py¬ 
rites existing in the Calp below. 
The uppermost stratum of hog was said to he chiefly moss, and to 
have a considerable thickness, and that additions are being made to it 
every year. 
The Meeting then adjourned to the second Wednesday in April. 
GENERAL MEETING, WEDNESDAY, APRIL 14, 1858. 
Bev. Professor Haughton in the Chair. 
The Minutes of last Meeting were read and confirmed. Donations an¬ 
nounced, and thanks voted. 
1. Bev. H. H. Jones, Adare, county of Limerick, being proposed by 
Mr. J. Beete Jukes, and seconded by Dr. E. Percival Wright, was elected 
an Annual Member. 
Mr. J. Beete Jukes read the following paper:— 
ON A MINERAL FORMING THE CEMENT OF A BOULDER OF CONGLOMERATE, 
FOUND BY G. H. KINA HAN, ESQ., OF THE GEOLOGICAL SURVEY, NEAR 
LOUGHHILL, COUNTY OF LIMERICK. BY A. GAGES. 
I owe to the kindness of my friend, G. H. Kinahan, of the Geologi¬ 
cal Survey, the.first specimen of the mineral which forms the subject of 
the present communication. That specimen, however, was too small to 
enable me to make an analysis of it. But other specimens having 
since been procured by the Geological Survey, from the same locality, I 
have been enabled to make a more complete investigation of it. 
The first specimen given by Mr. Kinahan appears to correspond with 
the description of Eischerite or Peganite, as given by Dufrenoy and 
Dana. It is composed of small crystals of an emerald green colour, 
mingled with some white ones, forming small mammillated concretions, 
cementing fragments of a quartzose grit. 
In the other specimens received, the mineral forms the cement of a 
conglomerate of a black chert-like stone. 
I am informed by the gentlemen of the Geological Survey, that the 
specimens come from a block found in the drift on the banks of the 
White Biver, four miles south of Loughhill, resting on coal-measures; 
blocks of limestone, trappean breccia, syenite, and granite, occur with it. 
