ELEMENTARY PHOTO-MICROGRAPHY. 



35 



poles, it will be desirable to have a tilting table 

 whereby the camera can be used vertically. A 

 convenient form to fit on top of a tripod is sold 

 by dealers, but a handy man can readily fit up 

 a couple of hinged boards with means of securing 

 them at right angles. The vertical board, of 

 course, has a screw for taking the camera, and the 

 horizontal board may be secured to the edge of a 

 table, or be attached in the usual way to the top of 



FIG. 27. 



TILTING]. BOARDS FOR CAMERA IN A VERTICAL POSITION. 

 A^very convenient form of vertical camera, which turns aside to 

 facilitate adjustments of the microscope, is supplied by Swift and Son. 

 Some other makers offer a camera bench designed for use in either 

 vertical or horizontal positions. 



the tripod. A glass tank placed underneath the lens 

 allows easy illumination of the object, and permits 

 regulation of the light either through the bottom 

 or sides by means of plain mirrors. For living 

 objects in motion the exposure must be in- 

 stantaneous, and sunshine or flashlight may be 

 enlisted for this purpose. 



