DistantCousin.com has scanned the original city directory for New Haven, Connecticut for 1894 and indexed it for your quick search. The site is super easy to use: click on the letter which corresponds to the first letter of the last name for the person you are seeking. You will be taken to a list of page numbers which correspond to specific surnames. Clicking on the page number should take you to the appropriate page.
These pages are scans of the original document which are fairly large files. The average page is about 120K and will download slowly if you are not on a fast connection.
This is high-quality online genealogy material: sit at home and view images of the original documents.