Kosher restaurant (1866, 1867)

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   THE AMERICAN ISRAELITE was published in Cincinnati from 1854.  It was
first called THE ISRAELITE.
   The word "kosher" was used early, but mostly in Hebrew.  The first use in
English (this would be OED's second cite, after 1851) is:

30 March 1855, THE ISRAELITE, pg. 304, col 1 ad:
NEW ENGLAND HOUSE,
   Hartford, Conn.
THE UNDERSIGNED RESPECTFULLY calls the attention of his friends and the
travelling community at large, to his commodious and well managed hotel, No.
55, Front street, Hartford, Conn.  The best accommodations and a first rate
_kosher_ table will be found at any time.
   SIMON SELLING, Proprietor

   As for the first "kosher restaurant," take your pick with these two:

9 November 1866, THE ISRAELITE, pg. 6, col. 4 ad:
   M. BERLINGER'S
KOSHER BOARDING HOUSE AND
   RESTAURANT
No. 13 Lodge Street between 5th and 6th
   CINCINNATI, O.
Meals at all hours of the Day.

15 February 1867, THE ISRAELITE, pg. 7, col. 3:
G. SELIGMAN begs to inform you that he will remove from his present premises,
   No. 254 Broadway, New York
To the BASEMENT
   No. 20 White Street, Near Church,
And open on the 1st of FEBRUARY his well known
   ("Kosher" in Hebrew--ed.)
   RESTAURANT
Where he will continue to serve dinners (and a cup of coffee) for fifty
cents.  Breakfast and supper _a la carte_.
   G. Seligman begs to return thanks for past favors, and solicits a
continuance of the same at his new and spacious premises, where he will
endeavor to do still better.