X-radiograph(s) of "Old Man"

Rembrandt Harmensz. van Rijn

Chiapas, Falls of the River Cháncalá

Teobert Maler

X-radiograph(s) of "Madonna and Child"

Andrea del Verrocchio

Kegon Waterfall, Nikkō

Kawase Hasui 川瀬巴水

X-radiograph(s) of "Portrait of a Man"

Hans Memling

[Large redwood trees along road]

Lyonel Feininger

Untitled (waterfall near Gössl, Austria)

Unidentified Artist

X-radiograph(s) of "Anne Comstock"

Gilbert Stuart Jane Stuart

[California]

Lyonel Feininger

Vernal Falls, Yosemite Valley, California

Ansel Easton Adams

[Western landscape]

Lyonel Feininger

Bridalveil Fall

Ansel Easton Adams

[Tree lined path]

Lyonel Feininger

X-radiograph(s) of "Landscape"

Rembrandt Harmensz. van Rijn

[Western travel]

Lyonel Feininger

Waterfall with a Half-Timbered House and Castle

Jacob van Ruisdael

X-radiograph(s) of "Mrs. Daniel Denison Rogers"

John Singleton Copley

[Western Travel]

Lyonel Feininger

State Road up Hurricane Fault, Utah

John K. Hillers

X-radiograph(s) of "Laura"

Giovanni Bellini

Untitled (Rimbach valley, Grünau, Austria)

Unidentified Artist

[Rural landscape, New England]

Lyonel Feininger

[California]

Lyonel Feininger

X-radiograph(s) of "Napoleon"

Jacques-Louis David

Untitled (cow stuck in tree branches)

Jack Rodden Studio

Don Sheldon, Mt. Dickey

Bradford Washburn

Forest, early morning, Mount Rainier National Park, Washington

Ansel Easton Adams

X-radiograph(s) of "Risen Christ"

Cornelis Schut I Peter Paul Rubens

Mt. Pala di Martino-Primiero Dolomites

Vittorio Sella

Hugh Miller Glacier

Bradford Washburn

X-radiograph(s) of "Lucrezia Borgia ?"

Bartolomeo Veneto

Very Pretty Waterfall for Herb and Dorothy

Pat Steir

X-radiograph(s) of "Landscape and Self-Portrait (double sided painting)The Beach at Concarneau"

Robert Henri

Untitled (fire burning, seen through trees)

Lucian and Mary Brown

X-radiograph(s) of "Magdalen Borne by Angels"

Antonio Vivarini Giovanni d'Alemagna Michele Giambono

[Man walking down tree lined path]

Lyonel Feininger

X-radiograph(s) of "The Entombment"

Jacopo Bassano the Elder

Untitled

Lucien Clergue

[Tree lined road]

Lyonel Feininger

[Car on country road]

Lyonel Feininger

[View of country road through windshield]

Lyonel Feininger

X-radiograph(s) of "Rape of Europa and Juno, Io and Jupiter"

Mariotto Albertinelli Giuliano Bugiardini Francesco Francia

Untitled (Paternkofel also called Monte Paterno)

Unidentified Artist

Waterfalls, Intervale, New Hampshire

Denman Waldo Ross

X-radiograph(s) of "Saint Augustine"

Allegretto Nuzi

X-radiograph(s) of "Blasted Elm"

Jacob van Ruisdael

Untitled (soldiers taking cover on ground, Vietnam)

Gordon W. Gahan

Untitled (Blauer Tumpf, Maltatal, Austria)

Unidentified Artist

X-radiograph(s) of "Sir Thomas Abney"

Wooded Landscape

Berthe Morisot

Untitled (nature abstraction)

Lucien Clergue

Waterfall

Denman Waldo Ross

X-radiograph(s) of "Young Woman"

Filippo Lippi

Plunge

Joel Janowitz

X-radiograph(s) of "Portrait of an Admiral (?)"

Ferdinand Bol Rembrandt Harmensz. van Rijn

["Ruine am Meere," 1929, drawing by Lyonel Feininger]

Lyonel Feininger

X-radiograph(s) of "St. John"

Ercole de' Roberti

[Front view of house and trees]

Lyonel Feininger

Untitled (Barrier Series)

Jack Tworkov

X-radiograph(s) of "Mystic Marriage of St. Catherine"

Bernardino Luini

X-radiograph(s) of "Calling of St. Peter"

Domenico Tintoretto

[Trees]

Lyonel Feininger

[Path through the woods]

Lyonel Feininger

[Stone wall]

Lyonel Feininger

X-radiograph(s) of "Madonna and Child"

Sandro Botticelli (Alessandro Filipepi)

X-radiograph(s) of "Moor"

Hendrik Heerschop

X-radiograph(s) of "Claude de Toulonceau and St. Claude"

Jan Provoost

Dam, Hope Valley, Scituate

Salvatore Mancini

Untitled (abstraction)

Nicholas Dean