ISO 



Transactions of the Society. 



board, similar to a pliotomicrographic or projection Microscope of 

 the present day. 



The second is a portable Microscope by John Cuff,* fig. 26, 

 which differs both from the Watkins and the Variable, because the 

 limb is hinged to the foot and not to the top of a pillar. The 

 mirror, stage, and body arm all fold up on joints, so it is a very 

 shaky affair, nevertheless, it is an important model, as it is the 

 second known example of a Microscope which has the body, stage, 

 and mirror attached to a hinged limb.f Its date can be fixed 

 approximately because it is signed Cuff, and Adams, who took 



Fig. 27.— The Variable, 1770. 



over Cuff's business in 1770, made this same model under his 

 own name ; also it was said to be an improved form of Ellis's 

 Aquatic Microscope, which was made in 1755, so it may be dated 

 " circa 1765 " without much error. It was one of Cuff's latest 

 Microscopes, probably inspired by the Watkins model of 1755. 

 With all these loose joints it was a type that, like the Watkins, 

 could never last. After Adams had appropriated this Cuff model, 

 Benjamin Martin was not long in following suit, for the large 

 instrument, which formerly belonged to His Majesty George III., 



* Joum. R.M.S. 1898, p. 675, fig. 117. 



t Microscopes of this form, without the folding joints, are still made in 

 France, and are sold here as youths' microscopes, for 14s. 6d. 



