This is a file from the Wikimedia Commons and may be used by other projects. Information from its description page there is shown below. Commons is a freely licensed media file repository.
Summary
DescriptionMIT dynamo room Boston campus c1895 cropped.png
English: Dynamo room of Electrical Engineering Lab in Lowell Building, MIT Boston Campus, c. 1890s
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:MIT_dynamo_room_Boston_campus_c1895_cropped.png
Captions
Dynamo room of Electrical Engineering Lab in Lowell Building, MIT Boston Campus, c. 1890s
Uploaded a work by {{Unknown|author}} from MIT Museum, Object ID: [https://mitmuseum.mit.edu/collections/object/GCP-00044250 GCP-00044250] with UploadWizard