U.S. surveys. Colorado Concluding work of Hayden surrey. Observations on discoveries ; Hayden survey. R.k.News.Jan.11,1878 p.2 c.2 Hayden ; observation regarding changes of habit in common toad. R. .News.Jan.20,1878 p.2 c.3 valuable collection of fossils. A News.Feb.12,1878 p.2 c.1 Tribute is paid to efficiency of geological and geographical explorations. R.M.News.Feb.21,1878 p.2 c.2 R.M.News.lug.2,1877 p.4 c.4
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