[Illustration]




SCIENTIFIC AMERICAN SUPPLEMENT NO. 821




NEW YORK, September 26, 1891

Scientific American Supplement. Vol. XXXII, No. 821.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

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TABLE OF CONTENTS.


I. Architectural.--The New Labor Exchange in Paris.--With
views of the interior and exterior of the building