DescriptionSulfur-burning-at-day.PNG A piece of sulfurburning with a blue flame that can hardly be seen at daylight (but it can be seen in this photograph
Original work compiled from: File:Goldkey_logo_removed.jpg File:Sulfur-burning-at-day.PNG File:Triangulum.nebula.full.jpg File:Brillanten.jpg All source
online through the Archival Research Catalog (ARC) at identifier 1554477. The media is available online at: Collection Finding Aid • DirectPDF (3.9 MB) Collection:
book from the CK-12 Foundation. Date 11 June 2009 Source CK-12 Foundation at www.ck12.org (See page ii of the book for the license) Author Craig Freudenrich