Progress map of lines and areas of explorations and surveys conducted under the auspices of the War Department: giving the area of the public domain lying west of the 100th. meridian of
![A sign marking the 100th meridian in central South Dakota. The 100th... | Download Scientific Diagram A sign marking the 100th meridian in central South Dakota. The 100th... | Download Scientific Diagram](https://www.researchgate.net/profile/Melissa-Wuellner/publication/261911748/figure/fig1/AS:392505527947280@1470592018736/A-sign-marking-the-100th-meridian-in-central-South-Dakota-The-100th-meridian-was-a.png)
A sign marking the 100th meridian in central South Dakota. The 100th... | Download Scientific Diagram
![Land and Water Conservation Fund Act: Forest Service Has Not Taken Steps to Ensure Compliance with Limitation on Land Acquisition | U.S. GAO Land and Water Conservation Fund Act: Forest Service Has Not Taken Steps to Ensure Compliance with Limitation on Land Acquisition | U.S. GAO](https://www.gao.gov/assets/extracts/93640e09a8dc609572e03268e12a3807/rId16_image5.png)
Land and Water Conservation Fund Act: Forest Service Has Not Taken Steps to Ensure Compliance with Limitation on Land Acquisition | U.S. GAO
![The 100th Meridian Initiative: A Strategic Approach to Prevent the Westward Spread of Zebra Mussels and Other Aquatic Nuisance Species: U.S. Fish and Wildlife Service: 9781507642368: Amazon.com: Books The 100th Meridian Initiative: A Strategic Approach to Prevent the Westward Spread of Zebra Mussels and Other Aquatic Nuisance Species: U.S. Fish and Wildlife Service: 9781507642368: Amazon.com: Books](https://images-na.ssl-images-amazon.com/images/I/41sUCljoQOL._SX384_BO1,204,203,200_.jpg)
The 100th Meridian Initiative: A Strategic Approach to Prevent the Westward Spread of Zebra Mussels and Other Aquatic Nuisance Species: U.S. Fish and Wildlife Service: 9781507642368: Amazon.com: Books
![National Science Foundation sur Twitter : "Is the 100th meridian west on the move? @LamontEarth picks up where 1800's geologist left off: https://t.co/sXVWEO0sqL https://t.co/umVW0UYeMD" / Twitter National Science Foundation sur Twitter : "Is the 100th meridian west on the move? @LamontEarth picks up where 1800's geologist left off: https://t.co/sXVWEO0sqL https://t.co/umVW0UYeMD" / Twitter](https://pbs.twimg.com/media/DcgtZlNVAAYNIHm.jpg)