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SUMMARY OF QUERENT RESEARCHES RELATING TO 



The larger form of camera is sbowu iu fig. 138. It consists of an 

 orcliuary mahogany pliotograjihic camera of medium size, with extending 

 arrangement, lengthening to about one metre, the amount of extension being 

 registered on a scale on the lower part of the camera. There are two 



slides for plates, 23 cm. soLuare, with wooden frames for plates of smaller 

 dimensions. 



The camera is fastened to a strong wooden base which also carries the 

 Microscope, the fine-adjustment being worked by a long Hooko's joint. 

 The Microscope docs not stand directly on the wooden base, but on a heavy 



