58 
THE SCIENTIST. 
almost entire examples from the Trenton 
Limestone. 
Five outcrops of Trenton Limestone 
were reported by Prof. Swallow in the 
old Missouri Survey, near New London, 
Kalis Co., on Salt Kiver, but we have 
never visited the localities. 
The Edgewood beds which served as 
the subject for our first article were re- 
ferred to the Hudson River Group, doubt- 
fully, but the discovery of additional 
fossils leads us to doubt our former re- 
ference and we now believe the rocks to 
be the equivalent of the base of the Nia- 
gara Group or the Clinton beds. 
The Pike County Pala30zoic strata 
embrace the following series of rocks 
from the lowest to the highest in correct 
order : — 
Trenton Limestone, exposed on Peuo Cr. 
Hudson Kiver Shales " Buffalo 
Niagai-a Limestone, " near Cornith 
[church. 
Lithoo-raphic Kstone, ^ onim-nnn 
and underlying Shales ) J.ouisiana. 
Shales and Ver-. / t • • 
micular Sandstone, \ Louisiana. 
Chouteau Limestone " near Curryville. 
Burlington Group " at Louisiana. 
Keokuk Limestone " on Indian Creek. 
Coal Measures " Peno Creek. 
'OR THE Scientist. 
Some Peculiar Nests and Ej^j^s. 
Geo. H. Berry, Cedar Kapids, Ia. 
During the past season I have observed 
some queer nesting sites. During May, 
1890, a gentleman and myself were cross- 
ing a meadow, when suddenly a Bluebird 
arose from the grass, almost under 
our feet. We thought nothing of this, 
but, as she came back and alighted in 
the grass from which she had risen, as 
soon as we had gone a few rods, we con- 
cluded to investigate. We found her 
nest with four typical light blue eggs in 
an old fruit can which was laying on its 
side in the grass. The same week I found 
a set of five eggs of the Brown Thrush 
four of which are of the usual size, 
the fifth being perfectly spherical and 
about the size of the eggs of the House 
Wren. This egg, upon blowing, con- 
tained no yolk. I have the feet now. 
Never heard of a similar case. During 
June, 1890, at Spirit Lake, Iowa, I found 
a nest of the Kose-breasted Grossbeak 
built on a beam, in an open shed, 
which stood in the woods about a fourth 
of a mile from the nearest house. The 
nest was built of sticks, coarse weeds, 
stems etc;, and lined with fibrous roots. 
The three eggs wei-e a greenish-blue, 
thickly speekled around large end with 
ligh*: brown. 
A curious case of socialism also came 
under my observation this season. In the 
forks of a small oak tree was a nest of the 
King bird containing five eggs and scarce- 
ly two feet above this, was a nest of the 
Orchard Oriole containing tour Oriole 
eggs and two Cowbird eggs. The birds 
appeared on terms of perfect harmony 
with each other and once I saw both 
Kingbirds and the male Oriole unite in 
driving away a large Hawk which they 
seemed to consider an unwelcome visitor. 
A friend of mine found a nest of Indigo 
Bunting last summer, containing three 
eggs. One of these was well advanced 
toward incubation, the other two were 
merely empty shells of the usual size and 
color, one of which was drilled before he 
noticed the emptyness. The other remains 
as it was when taken. I have examined 
it carefully with a magnyfying glass but 
can find no crack or fracture whence the 
contents could have been extracted. An 
old man said they were sucked by a 
snake but I cannot see how a snake or 
anything else could extract the contents 
and not fracture the shell. 
I wish to correct the article on " Owls 
of Eastern la.," appearing in the Jan. 
Scientist by stating that my eggs 
of the Great Horned Owl that appear of a 
