192 J. W. Dawson on the Coal-measures of Cape Breton. 
Mr. Lesley himself to modify. My objections may be stated 
under the following heads. 
(1.) It is scarcely safe to institute minute comparisons between 
the enormously developed Coal-measures of Nova Scotia, and 
the thinner contemporary deposits of the West, any more than 
it would be to compare the great marine limestones of the period 
at the West, _ the slender representatives of the part of the 
group to the eastwar 
(2.) There is He best coe that the Coal‘measures of Nova 
Scotia never mantle the Devonian and Silurian hills of 
the Province, but wakes on = ies contrary, deposited in more or 
less a areas on their si es. 
(3.) Any one, who has carefully compared the Coal-measures 
of the Joggins with those of Wallace and Pictou, must be con- 
vineed of the hopelessness of comparing individual beds, even 
at this comparatively small distance. A fortiort, detailed com- 
parisons with Pennsylvania and more distant localities must fail. 
(4.) I do not think that any previous observer has su 
that the coal-measures of Eastern Cape Breton represent the 
whole of the coal formation of Nova Scotia. 
Coal-measures” of my paper on Nova Scotia are certainly want 
ing, and probably the Sydney coal- feld exhibits no stir pe 
than the middle of No. 4 of Logan’s section at the Jog 
ese do not occur at a (peat but are found § in genie Scotia, 
as in Virginia and Southern Pennsylvania, at the base of the 
system under the marine limestones. The Albert beds are the 
ogame of these Lower measures, and not of the Pictou — 
aper on the Lower Carboniferous Coal-measures 
oal. In my p os 
ete of Geological Society of London, 1858), will be found @ 
summary of the structure of the Lower Coal-meas asures, as shown 
at Horton Bluff, and elsewhere. The —_ “ true-Coal-measures,” 
quoted by Mr. Les esley, does not mea description, the 
SN eg pete te eee are eg 
es 
my 2 
Middle Coal: a but merely that eit of them holding the ae 
workable coal-seam: 
hatever mae be the value of Mr. Lae s appliow 
tions of oe fossil flora to the identification of coal-se. 
spel m p seniy to state, as ti result of an excuses series 
