

DIR. Mackay's NaOigator.
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THOAIAS CLARK, Bookseller.


Il Portland, Mrnc.....W Will shortly publish
an improved edition Of Dr. MAcKAY's CON-
PLETE NAVIGATOR, Untitled, The .fs7rricQn
Complete Navigator, and SeaDlan's DGiIy .4ssfst-
ant being an easy and familiar guide to the The
ory and Practice of Navigation containing all
thenecessary Tables and Rules, with demonstfa-
tons, and illustrated with several appropriate
Engrayings being an improved edition of
the Complete Navigator, published by AN
DREW MACKAY, i. i. j. +. p. 5. Ed. &c.-at
london, a. ID. l8O4-reyised, corrected, and
considerably enlarged, by several gentlemen
Of information, and particularly adapted for
thu use OF American Seamen."


IN Dr.. Nackay's work, some hundreds OF
errors are detected, in all the treatises on navi
CATION eztant The worl, in the press i pas
sing through complete revision By several
gentlemen, who will examine every part Of Il.
and more especially the tables, which are more
numerous and extensive than can be found in
any work upon the subject And the publish
er fiatters himself that it viii issue from the
press 7gifiom a single error.


As the most approved publication upon thc
theory 2ni practice of Navigation (cxceDt DIR.
Maclay'Sl contains q great nu-lber of r.ista.es
particularly III The tahi2s) which might prove,
fatal 70 the mariner, il IS confidently believed.
taat sa2 tgcat;cc now offered to public patron.
lge, vii suPersede every other work of the
siHd. Dec. SO, SOS,