This is one of a series of posts written in celebration of Women's History Month, and profiling additions of new images of female scientists to the "Women in Science" set on the Smithsonian Flickr Commons. We invite you to subscribe to The Bigger Picture blog to keep up with new posts.

This is our fourth year celebrating Women's History Month by showcasing women scientists and science journalists as represented in our Science Service biographical file. And once again we're reaching out to you, our blog readers and Flickr Commons community, for help identifying women in some of the new images we've added online.

The Archives relies on information available on the original prints and researchers and volunteers who write captions for the images, but sometimes there's not much to go on, so we're putting this out to you for assistance. We've had great success with this the last three years.

Among the unidentified (or partially identified) photographs are an "expedition secretary" showing atatl darts from a gypsum cave, a Science Talent Search winner, an anatomy researcher at the University of California, and a clerk in a marine biology laboratory.

We hope you enjoy all the images we're posting this month, and perhaps take a stab at helping us get to know some of these women better.