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Title: Worker on ladder in the sugar bush

Title: Plastic collection bags

Title: Tree 499, Proctor Maple Research Center sugar bush

Title: Worker tapping sugar maple

Title: Surveying the sugar bush

Title: Collecting maple sap in the sugar bush
Description: Winter, 1949

Title: Workers setting up an experiment in the sugar bush

Title: Tree 487, Proctor Maple Research Center sugar bush

Title: Sugar maple

Title: Plastic collection bags
Description: Winter, 1952

Title: Worker collecting sap to transport to sugar house

Title: Worker in the sugar bush

Title: Trees 457, 459, 458, Proctor Maple Research Center sugar bush

Title: Sugar maple

Title: Collecting sap in the sugar bush
Description: Winter, 1949

Title: Worker collecting maple sap

Title: Tree 477, Proctor Maple Research Center sugar bush

Title: Trees 457, 458, 459, Proctor Maple Research Center sugar bush

Title: Worker power-tapping sugar maple

Title: Collecting maple sap

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