{"product_id":"1997-213-1-66","title":"Steam-Driven Tractor Hauling Wood for Dredges, c1920.","description":"\u003cp\u003eBlack and white view of a tractor hauling wood.\u003c\/p\u003e\n\n\u003cp\u003eCaption:  A steam driven snow tractor hauling wood to a dredging site for use in thawing frozen gravel in front of a dredge.  Below a foot or so, the ground was always frozen - except in gravel stream beds - \"perma frost\".  As much as 10,000 cords of wood would be accumulated for these operations.  (About this time cold water thawing was developed - wood had become too scarce and expensive.)\u003c\/p\u003e","brand":"Canadian Photo Archive","offers":[{"title":"Personal Use","offer_id":39471156822208,"sku":"1997.213.1.66-PER","price":15.0,"currency_code":"CAD","in_stock":true},{"title":"Commercial Use","offer_id":39471156854976,"sku":"1997.213.1.66-COM","price":65.0,"currency_code":"CAD","in_stock":true},{"title":"Publication including Video Use","offer_id":39471156887744,"sku":"1997.213.1.66-PUB","price":25.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0508\/6117\/9072\/products\/1997.213.1.66.jpg?v=1616615957","url":"https:\/\/dawsonmuseum.ca\/products\/1997-213-1-66","provider":"Dawson City Museum","version":"1.0","type":"link"}