https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/3276621![Diagram no.7 print in high resolution. Digitally enhanced from our own edition of Solar Biology by Hiram Erastus Butler…](https://images.rawpixel.com/image_social_portrait/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvcGRzb2xhcmJpb2xvZ3kxLTA3LmpwZw.jpg)
![Diagram no.7 print in high resolution. Digitally enhanced from our own edition of Solar Biology by Hiram Erastus Butler…](https://images.rawpixel.com/image_social_portrait/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvcGRzb2xhcmJpb2xvZ3kxLTA3LmpwZw.jpg)
Diagram no.7 print in high resolution. Digitally enhanced from our own edition of Solar Biology by Hiram Erastus Butler (1841–1916).
Diagram no.7 print in high resolution. Digitally enhanced from our own edition of Solar Biology by Hiram Erastus Butler (1841–1916).
Public DomainFree CC0 image for Personal and Business use