464 A. C. BAXFIELD ON PREPARING STEREO-PHOTOMICROGRAPHS. 



f. Plano-concave lens to parallelise the converging rays from e. 



This gives a parallel beam of small diameter, but of great 

 intensity. 



g. Object stage laterally adjustable by means of the vertical 



pinion. 



h. Small mirror universally adjustable. 



i. 35 mm. lens (Zeiss Planar). 



j. Focusing pinion. 



k. Camera. 



I. Optical bench, on which the whole of the above is adjustable. 

 The optical axis of the condensing system is 52 mm. above 

 that of the camera. The horizontal line shows the course 

 of the central ray of light. The condensers d and e are 

 mounted on a hinged fitting, the one not in use being 

 folded down out of the path of the rays. 



Plate 38. 

 Mycetozoa (Physarum nutans), x 12. 



Plate 39. 

 Peristome of moss (Milium undulatum), x 29. 



Plate 40. 

 Skeleton of young Star-fish (Asterias glacialis), x 7. 



Journ. Quekett Microscopical Club, Scr. '2, Vol. X., A'©. 05, November 1909. 



