This photograph from the Boston Gas Company Records is in the public domain. No copyright permissions are needed. Acknowledgement of the Boston Gas Company Records as a source for borrowed images is requested.
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Notes:
Forms part of the Boston Gas Company Records. Original photographic print (cyanotype ; image 15 x 20 cm., on sheet 20 x 34 cm.) found in Box 40, Folder 8. Original image not held by Boston College.
Written on sheet: "tried in furnaces under retorts at North End Station, having a chamber for circulating water next to the coke fire, with ports to blow the resulting steam in between the grate bars."
