142 



REPORT — 1897. 



to penetrate. After 10 or 15 minutes, when, by examination of the back 

 of the film, all trace of yellow colour in the film is seen to have dis- 

 appeared, the hypo is poured back to its bottle and the film is thoroughly 

 washed for at least 15 minutes in several changes of clean water. The 



Fig. 2. — Japan Earthquake ; Carisbrooke Castle Record. 



hypo may be used perhaps twenty times until it has become dirty and 

 ceases to have a saline taste. 



The film in its tray of water is then placed on a plank or flat floor. 

 One end of the film is pulled out of the tray and placed face upwards on 



Fig. 8. — Displacements on September 10. 



the plank or floor, after which the tray is drawn backwards and the film 

 runs out and is left to dry. 



Any particular portion of a film may be reproduced by tracing on 

 tracing-paper, or by photographical printing. For the latter process 



place the film with its back on a piece of 



glass or 



the glass face of a 



printing frame. A piece of bromide paper is placed with its sensitive 

 surface in contact with the film, and over this a strip of wood or the back 

 of the printing frame, when the whole four are clamped together with 

 springs, clips, or indiarubber bands. 



i 



