88 The American Geologist. February, 1905 
wliich he had been instructed by the legislature to examine. 
He calls attention to the roofing slates of east Tennessee 
and describes the search for placer gold then carried on in 
a few places in the Ocoee region with indifferent success. 
He suggests that the Tennessee river once cut across 
Walden's ridge and flowed down the Sequatchie valley. In 
a note there is added a list of the fossils he had found in the 
mountain limestone of the state. 
In his fifth report, Dr. Troost gives in some detail a 
general description of the geology of the whole state, and 
continues his account of the soil and mineral resources of 
the counties by a description of Cocke county in which much 
attention is given to the iron ores. Iron furnaces and iron 
•ore, elsewhere are noticed briefly and mention is made of 
silver ore and mineral waters. In an appendix 116 species 
of fossils are listed and a number of them, especially the new 
species, are described at some length. 
In the sixth report the general geology of middle and 
east Tennessee is redescribed in the light of the work of 
Sedgwick and Murchison and the terms Cambrian and 
Silurian substituted for grauwacke. The rocks of middle 
Tennessee are referred to the Silurian and the fossils found 
in them are listed and some of them described. A descrip- 
tion of Sevier county is given and attention is called to its 
roofing slate. 
The seventh report gives a detailed description of the 
geology of Davidson county with numerous references to 
the occurrences of the same strata in adjoining counties. An 
account is given of the greensand of McNairy and adjoining 
counties and a list of the reptiles and of the fresh water 
shells of the state is added. In a supplement a brief account 
is given of the lead and zinc ores of east Tennessee. 
The eighth report describes several routes by which a 
railroad from Nashville to Chattanooga could be constructed 
and directs attention to the coal, iron and limestone of the 
region that would be traversed by the road. In obedience 
to a resolution of the legislature a report on the marble, or 
rather limestone, of Caney fork is added. 
The first part of the ninth report contains a description 
of Jefferson county and the second part gives an account 
