LANTERN SLIDES, ETC. 



147 



In lantern-slides one desires much detail and little density ; it is customar)', 

 therefore, to develop only until there is a good surface image. On no account must 

 the development be pushed until the image shows through on the back. Even the 

 densest portions must be translucent. Slides suitable for projection with very bright 

 lights may prove too dense for dull ones. In making lantern-slides one must keep 

 in mind the kind of light to be used in projection. 



In making enlargements, the camera is lowered to the horizontal and pointed 

 away from the window, and the object is lighted in part from above (skylight). To 



Fig. 132.* 



facilitate shifts it is convenient to liave the table-top (to which the camera-bed is 

 screwed) turn freely on a central pivot, and the legs of the table should be mounted 

 on casters so that it may be moved about easily. The table devised by the writer is 

 shown in plate 17. This was built by a carpenter and does well enough. In 

 making enlargements the lens-board is removed from the interior and substituted 

 for the kits in the front end of the camera ; the ends of the wooden carrier (shown 

 on first shelf of the camera-table) are slid under the beveled cleats at the front end 



*FiG. 132. — Side view of a convenient small dark-room, devised by Mr. Hubbard, 



