Limonite ore-beds of the Limestone region. 183 
abundantly than in Vermont. An analysis of ore from the 
Leet ore-bed, West Stockbridge, by Dr. A. A. Hayes, made in 
1845, obtained red oxide of iron 76:18, oxide of manganese 
504, phosphoric acid 2°36, water 10°80, quartz and gangue 
3°40 = 98-78.* At the same time, phosphoric avid is ver 
sparingly present; and there is only a trace of sulphur or none 
at all. The clay, while generally impure from the presence of 
iron ochre and other mineral material, is sometimes a white 
kaolin.t+ : 
(2.) The geological distribution of the beds. 
(1.) The limonite deposits are alike throughout the lime- 
stone area in their interrupted occurrence and varying depths— 
even many miles often intervening between those of workable 
value, and all depths existing from zero to one hundred and 
fifty feet or more. 
on the borders of Wallingford and Tinmouth; and at the 
south end of the State in Bennington. These last are near the 
Taconic (or Great Central) slate-belt. 
In Berkshi 
* I am indebted for a copy of this analysis to Mr. J. W. Hoysradt, President of 
the Company. Mr. Hoyarats states that no later analysis has been made; but he 
oe impression that the ore now obtained yields less manganese and phos- 
acl 
+ While limonite (in which the oxide of iron, Fe,0;, and the elements of water 
are in the proportion of 2 to 3) is the principal ore, there is also at Salisbury, as 
first shown by Prof. G. J. Brush (this Journ., II, xliv, 219, 1867), and probably 
it fn Pose the same ratio is 2: 1), and a 
little géthite (in which the ratio is 1: 1); also occasionally a red ochre, which 
be either turgite, or the simple anhydrous oxide Fe,0,. Besides the iron and 
manganese ores, there are also traces of cobalt and zinc. : 
