His specimen cards of flowers, hand tinted at the studio, were as often framed as used in the meadows to identify the many types of plants blooming there. His work in Yosemite included both the classical production photos of such artists as Adams, d'orotones that had the depth and clarity of holograms, and his own unique work with flowers and also his candids of the people of Yosemite. That, with his inventions which later included the first microscopic motion picture camera, "Sunset Magazine, May 1927", the X-Ray motion picture camera and the first underwater motion picture camera, "Picturing Miracles of Plant and Animal Life and Popular Science, January 1929", were used on his extensive lecture tours to all the major forums and universities in the United States, England and the South Seas. His many nature films, eventually shown in theaters as well as in schools, clubs and for his lecture tours awakened the public to the need for conservation in the wake of Muir's death in 1914.