ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



441 



part of the seventeentli .century, the type of construction is too modern 

 for the pedigree assigned to it by the owner. 



The construction of the eye-piece is peculiar : the field-lens is fixed 

 on the top of the body-tube, and the eye-lens is in the outer tube sliding 

 over the body-tube, so that the distance between the eye-lens and the 

 field-lens can be varied. 



We may remark that the first application of a field-lens to the eye- 

 piece of a Microscope that we have hitherto found recorded is in 



Fig. 63. 



Fi« 64. 



Monconys' 'Voyages' (Lyon, 1665, 4to), I 1 r (M. de 



Monconys' son) mentions that the first Microscope of this kind was 

 devised by M. de Monconys about ten years previously, and was made at 

 Augsburg. 



