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Undated
Fossil specimen of an insect
Unidentified photographer
[photographs, lantern slides
ca. 1906/1912
Fossil specimen of Panorpa a …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Phenacole …
Unidentified photographer
[photographs, lantern slides
Undated
Theodore Cockerell and an un …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Porana te …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Vitis flo …
Unidentified photographer
[photographs, lantern slides
ca. 1906
Fossil specimen of Lomatia a …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil type specimen of Sapi …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Castanea …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Heyderia …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of an insect
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Panax and …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Phenanthe …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil type specimen of Chlo …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Populus l …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Tipula ma …
Unidentified photographer
[photographs, lantern slides
ca. 1906/1912
Fossil specimen of Agrion te …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Dryobius …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Calyptapi …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Pellaea a …
Unidentified photographer
[photographs, lantern slides
ca. 1906
Fossil specimen of Microstyl …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimens of Trichoph …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Stipa lam …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Myrica di …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil type specimen of Syrp …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Rhus cori …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Phymatode …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil specimen of Pinus whe …
Unidentified photographer
[photographs, lantern slides
Undated
Fossil type specimen of Quer …
Unidentified photographer
[photographs, lantern slides
1909-02-17
Letter from W. M. Wheeler to …
Wheeler, William Morton, 186 …
[letters (correspondence), a
1909-02-15
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1909-02-23
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1909-05-15
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1909-05-26
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1911-02-08
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1911-03-22
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1911-03-26
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1911-04-06
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1911-06-15
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1911-08-23
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
Undated
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1912-04-11
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1912-05-24
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1913-03-06
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1913-04-09
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a
1913-11-22
Letter from H. F. Wickham to …
Wickham, H. F. (Henry Freder …
[letters (correspondence), a