[Two sets of the words “the other; but the letter o which the left eye should see is blurred. The condition is at once signalized by the absence of the vertical arm of the cross which must be made to reappear. In the preceding chart it is not only necessary that the first four lines be read without a break but it is necessary that the text seen at the right and left of the upper black square itself furnishes the proof that it is seen by the left eye and that the text placed under the square is seen by the right eye only. Furthermore it is necessary that the upper square appears transparent and on the same vertical line with the following square seen with the right eye only. When this last result cannot be obtained of if the beavy black vertical lines in the present chart do not appear parallel it is because there is a rotation of the eyes on their axes.”], G9, American Optical Company, Javal L 4, no date.
Item — Box: 9, Item: 133.43
Scope and Contents
From the Series:
This series is compiled of collections of stereoscope cards, each with its own purpose, such as function or entertainment. These collections come in boxes specific to the cards.
Dates
- Copyright: no date.
Creator
- From the Collection: Broadbooks, John A. (Person)
Extent
From the Collection: 18.75 linear feet
Language of Materials
From the Collection: English
From the Collection: French
From the Collection: German
From the Collection: Spanish; Castilian
Repository Details
Part of the Truman State University, Pickler Memorial Library, Special Collections Manuscripts Repository