The December 1945 issue is largely focused on discussing industry on the railroad, and attracting more, including an article for the newly formed Department of Industrial Development. A particularly useful article shows several new ads highlighting some of the companies on the New Haven Railroad:
Eastern MassachusettsAmerican Tread Company
Reed & Barton
Packer's Tar Soap
Silent Glow Oil Burners
Beaded Tip Shoe Laces
Grinnell & Co
J&P Coats Threads
Kennescot Wire & Cable Co
Western MAAmerican Optical
American Woolen Co
Eagle A Papers
HB Smith Cast Iron Boilers
Chase Brass & Copper
Seth Thomas Clocks
Singer Sewing Machines
There are a lot of industries I don't recognize. The ads were for a full-color booklet, Southern New England for Tomorrow's Industry." I'll have to see if I can find a copy, although it looks like there is one at UCONN in the Dave Peter's collection.
In addition to that, there are also occasional articles on a specific online industry. One of particular interest to me is in the July 1947 issue: and we do mean "Universal" - the oldest and the newest which is about the Landers, Frary and Clark industry in New Britain. It's a brief overview of the company and it's products, with one particularly useful bit of information: "To expedite shipments, Herbert Wyatt, Traffic Manager, ships complete carloads from the New Britain plant whenever possible. These cargoes are then broken down into spammer shipments at eight district warehouses throughout the country. Time to see if I can find out where these were located...
The June-July 1946 issue has an article on the Pond's plant in Clinton, CT. This is even better, indicating, "Only the finest and purest ingredients go into the products at Clinton, but they arrive in carload lots - tank cars of white oil from Pennsylvania, carloads of talcum powder, beeswax, stearic acid, glass jars from Washington Pa., bottles from Zanesville, Ohio, chalk from the "white cliffs of Dover." The finished products are shipped out in carload lots to warehouses in various parts of the country..."
There's also a photo with a caption that states, "The New England Transportation Company handles all Pond's l.c.l. business."
This type of information isn't always easy to come by, and while there are only a handful covered here, it's a start.