Map covering New England states and part of Quebec prepared by Boston Chamber of Commerce to show where milk for Boston was obtained. Numbered pins indicate dealers’ collection points, gray pins, Quebec creameries and factories and black pins, New England creameries and factodes. Reproduced from “Investigation and Analysis of the Production, Transportation, Inspection and Distribution of Milk and Cream in New England”. issued by the Boston Chamber of Commerce. July, 1915.

Pin Maps and Charts by Health Officers, 1917
Gardner T. Swarts, Jr.