ScientificAmerican1931-06.jpg Radio 1924-12ThumbnailsRadio 1924-12ThumbnailsRadio 1924-12ThumbnailsRadio 1924-12Thumbnails
Triangulation -- building the backbone of accurate maps. Expeditionary mapping and surveying crew in a remote location in snow-covered mountains, working with transit and parasol to record map data.



Artist: Howard V. Brown

Source: Steve Kirch, collector, and creator of this website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner