
Portrait of rust. Photo of old pipes near the beach at Crissy Field, Golden Gate National Recreation Area, San Francisco, California.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Jaws of life. Photo close-up of lipstick palm tree infructescence, Finca Cantaros, San Vito, Costa Rica.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Surreal roofscape. Photo of the side of an apartment tower and rooftop structures on an adjacent building on Russian Hill, San Francisco, California.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Leaf study: entropy. High-resolution scan of fallen Eucalyptus deglupta leaf in process of turning from green to brown, Finca Cantaros, San Vito, Costa Rica.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Nautical architecture: study 1. Photo of the Hercules, a tugboat berthed at the Hyde Street Pier, San Francisco Maritime National Historical Park, San Francisco, California.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Op art agave. Photo of thin spikes of an agave in the Strybing Arboretum, Golden Gate Park, San Francisco, California.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Geologic medallion. Photo of ribbon chert exposed by road cut, Marin Headlands, Golden Gate National Recreation Area, California.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Temple of Botany altar piece: model 1. Photo close-up of heliconia bract, Paraiso de Heliconias, San Vito, Costa Rica.

Temple of Botany altar piece: model 2. Photo close-up of heliconia bract, Paraiso de Heliconias, San Vito, Costa Rica.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Upstairs/downstairs. Photo of stairs on exterior of small oval building housing restrooms in Aquatic Park complex, San Francisco Maritime National Historical Park, California. Stairs led to a flat roof originally used as a lifeguard station for the park.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.

Leaf geometries: version 1. Photo close-up of bromeliad leaves, Paraiso de Heliconias, San Vito, Costa Rica.

Leaf geometries: version 2. Photo close-up of bromeliad leaves, Paraiso de Heliconias, San Vito, Costa Rica.
© Harry Hull III and Mandalagraphs.com, 2013. Unauthorized use and/or duplication of photographs and other material on this blog/website without express and written permission from this blog’s author and owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Harry Hull III and Mandalagraphs.com with appropriate and specific direction to the original content.