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Some photometrical measurements [microform]
Smith, W. G. (William George), 1872-1943 · 1904 · [Toronto : University Library] · 2 pictures
Photometry · Colors · Photométrie · Couleurs
Internet Archive · Canadiana.org · Public domain (published before 1931) · More from this library
![Picture 1 of 2 from Some photometrical measurements [microform] (1904), leaf 5](https://img.insideoutlibrary.com/img/200/ia-cihm_991340-5-0.webp)
![Picture 2 of 2 from Some photometrical measurements [microform] (1904), leaf 13](https://img.insideoutlibrary.com/img/200/ia-cihm_991340-13-0.webp)