LOST IN MANHATTAN? Ask the MASTER CABBIE
The New York City address slide guide (t.m. s.m. patent pending). A simple piece of folded (Sleeve)cardboard, with another piece of cardboard inserted. With a cut out to pull the inserted card to a desired location on the decorative front of the sleeve, and a slot for viewing addresses and cross street on the inside of the sleeve.....Ingenious.
How many people can name the nearest cross street to an address on a Manhattan Ave. without looking it up??? Not many...I must admit there are a few I would have to look up, but not many.
The Manhattan Grid is the key. Addresses were designed to allow for easy calculation in finding an address.
Example: 780 1st Ave. is at 42nd ST.
Process to calculate: Cancel last digit of address 780 = 78 and then divide by 2 = 39 and then add the key number +3....= 42 Street.
Where do you get the key number??? From the Master Cabbie of course www.mastercabbie.com