Exhibit 19 
Exhibit 20 
Exhibit 21 
Exhibit 22 
Exhibit 23 
Photograph of Laussedat’s vertical-plate phototheodolite, 1898. 
(Lent by the Conservatoire National des Arts et Métiers, Paris). 
View of Mont Vàlerien, 1861. 
Photograph print of a negative on “papier ciré” made by Laussedat in 
September 1861 for the survey of the Fort du Mont Valérien during a 
re-enactment of the siege. 
(Lent by the Conservatoire National des Arts et Métiers, Paris). 
Panel illustrating Laussedat’s method of photogrammetric, survey, 1863/8. 
Prepared by Capi Javary’s company in the period 1863 to 1868. 
(Lent by the Conservatoire National des Arts et Métiers, Paris) 
Reproduction of Manzi’s photogrammetric map - “Saggio di rilievo foto 
topografico”, 1876. 
(Lent by the Istituto Geografico Militare, Florence). 
Photograph of Laussedat’s universal phototheodolite, c 1902. 
(Lent by the Conservatoire National des Arts et Métiers, Paris). 
Fourcade terrestrial camera, 1904. 
Used in the first photogrammetric survey in South Africa. 
Its particular feature lies in the use of a reseau scale which was impressed 
by ‘contact’ printing upon the photographic plate before the picture ex 
posure was made. To do this a silvered glass reseau plate carrying a grid 
scale of transparent cross lines ruled 5 mm apart in the silver coating 
was placed immediately in front of the photographic plate with a slight 
clearance. When the grid scale had been impressed photographically on 
the plate, the reseau plate was let down and the terrain photographed in 
the usual way. 
(Lent by the University of Cape Town). 
Paganini’s phototheodolite, no 5, 1897 modified in 1912 by Rimbotti. 
It was used in the Himalayan region for rapid mapping at scales of 
1 : 50,000 and 1 : 100,000. 
(Lent by the Istituto Geografico Militare, Florence). 
Finsterwalder’s phototheodolite, 1895. 
For terrestrial photogrammetry, using a vertical image plane. The ob 
jective can slide vertically. Focal length /=16 cm; picture size, 
12 X 16 cm. 
(Lent by the Institut fiir Photogrammetrie, Technische Hochschule, 
Munich). 
Canadian photogrammetric outfit, 1925. 
Comprises a camera and a transit theodolite each equipped with foot- 
screws to fit the same tripod-head. All the survey data were measured 
by means of the theodolite, and the camera was then substituted for the 
theodolite without moving the tripod. 
(Lent by the Science Museum. London). 
Pulfrich-Zeiss stereocomparator, 1902/03. 
The stereocomparator, of which this is a later model, was the first stereo 
measuring instrument. 
It was invented by Pulfrich for the measurement of the plane co-ordinates 
of homologue image points on the photographs, to enable the spatial 
co-ordinates of the corresponding object points to be computed mathe 
matically. 
(Lent by the R. E. Equipment Branch, War Office, England). 
Fourcade measuring stereoscope, 1904. 
Independently of Pulfrich (exhibit 22) and at about the same time,