Page:Popular Science Monthly Volume 89.djvu/731

 Popular Science Mouthb/

��Mr. Wooilman's appara- tus the first t)perati<)a consists in placing the handle of the developing tank on the first position ol the qiuidrant, on line marked 1. This insures the insertion of the first plate in compartment I of the tank. The plate- holder of the camera is then removed from the camera box and 'placed in the transferring-hopper for its entrance into the tank. After it has been securely fastened to the hopper by the operation of a lock-bar, the slide on the holder is withdrawn without exposing the plate.

Because the transfer- ring hopper is lined with lilack felt, making a light- light joint with the holder, the plate is protected from the light while it is being passed from the holder to the hopper.

Next, the plate is pro- jected into the tank. This is done by releasing the locking-dog attachment

���Introducing a plate into the tank. The handle is pulled back just long enough for the plate to pass through

����Pouring the developer into the tank through the funnel. The plates are left in the solution for about ten minutes

��Placing the camera plate- holder in the transferring- hopper for its entrance into the tank. It is securely held in place by a lock-bar. Afterwards the plates are washed and placed in the fixing bath in the same way for fifteen minjtes

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and pulling back the handle, which opens the admitting slot and closes it automatically as the handle is released. This protects the plates in the tank while the plate- holclcr is being changed. The handle on the hop- IXT isthcnad\ancetl to the second line on the ciuad- rant, the plate-holder is reversed, and another plate inserted. The oper- ations are repeated until the tank is loaded. At this point the transfer- ring-hopper is pulled out of the slot in the tank cover. The plates are now ready to rcccixe the de- veloping and fixing bath. It is not necessary that all twelve plate com- partments be filled to carry out the developing operation. One plate may be de\eloped as easily as twelve. How- ever, twelve plates can be developed at the same time and the so- lutions saved each time.

���The plates removed in bulk from the tank after the fixing bath. They are now ready to be thoroughly cleaned and dried

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