Edwardsville spectator. [volume] (Edwardsville, Ill.) 1819-1826, 1824-11-02

This Map will be founded or and embrace,
generally, the valuable and original matter
contained in the " American Atlas" published
BY the suthor of the propnsed Map, 10 which
will be added the results of various surveys
and explorations recently completed, and alch
as are COW in progress, and may be finished
previous 10 the publication of the work.
rhe projection adopted for the proposed
Map is similar to that selected for the Maps OF
the different States centsned in the Atlas just
mentioned; by which the mrridisns aud paral-
leis OF latitude are made Ia intersect at right
angels, as nearly due regard to tic laws Of
the decrease of the former would adAit. This
mode, Of projecting Maps on an extensive
scale, represents the various qaadrlaterial
figures similar TO those on the Artihoi<i eiobs,
I and affords very nesr approximation in
other resprots to the earth itselfi distances 10
any direction may be accurately sscertained,
with facility, BY the application of the simple
scale; the respective disgonals Of the inter
secung lines OF projection, are ot An equal
| length throughout the map it 9 5,istes taar
| extreme distortion which results from the use
of what is called the plane pro- ction," in
which the parallels of latitude ar represent
ed by straigh, lines, and, in fine, il represents
the understanding picture ofthc correspond
| ing feature on the Nsionsl Globe, as near its
| orig nal, as such representation can possibly
be gwen ON plane surface.
In connecting the various materials collect
| ed together for the map, certain established
| points viii be adhered to as land marks or
! guides for latitude and longitude, to which
the local surveys, &c. will lie made to con-
form. Particular reference will, however be
had TO such positions as shall have been sub
iected to tie most frequent and scientific OBJ
servat,ons OF men Of known skill, whose de-
dnctIons Will be compared, and if found ia DIFF
Ter on any material point, such position will be
adopted as a due regard 10 the character for
accuracy OF the respective observers, taken in
connection with The advantages or dissdvsnta-
gcs that may have attended their operations,
nav dictate.
| The recent survey Of the northern bounda-
Try OF the United States, made in conformity
TO the treaty of Client, will constitute the basis
OF so much of the proposed Nap was en-
braced within the range Of chat survey; aud
the survey of the Atlsntic and Gulf Coast
made by order of the Navy Department will be
used for the base of the southern and eastern
PORTIONS OF it. For the intermediate space,
tr1course will be had to the latest and best in
formation regarding its natural confgurston,
Its seas, skes and Islands; mountains, hillsaad
-" Letters on tbs subject must com
W 4OsN III V ct isffst En- II J(JC <fsb.11s
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The Proceedings of Congress at large;
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| Promotions and designations in the Army
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| ton. As may, from time totilne, be promulgated
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| and reference, and to each volume will be adj
ded copious Index.
! The first Volume was commenced with the
last Session of Congress; and each future Vo-
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The Papers, sent by mail, are packed with
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