Notes. 



289 



falls into an error in stating that the Microscope he represents in 

 plate 2, which is similar to fig. 80 above, is described in the London 

 Physiological Journal (1843). He has failed to note the alteration 

 in the fine adjustment. 



Fig. 79. 



We are, however, slightly anticipating the next Microscope Powell 

 made for C. Varley, which is figured and described in the December 

 number of the London Physiological Journal for 1843. It will be 

 unnecessary to fully describe this instrument; I may merely state 

 that it had a lever motion to its stage, a rackwork coarse adjustment 



June 20th, 1900 X 



