NOTE ON LETTZ NEW MICKOSCOFE STAND. 



311 



would be premature to say that it is efficient, time alone can 

 decide that question, but, so far as one can judge, it would 

 seem that we have here a useful addition to our microscopical 

 contrivances. Notwithstanding these alterations, the price of 

 the instrument remains unchanged. 



In conclusion, I would suggest four improvements : — 



1st. That the toes of the claw foot be not bent inwards ; 

 the spread then would be 6 X 6 inches. 



2ndly. That the stage be made perfectly plain, the lugs of 

 the sliding-bar bearing on the edge instead of on the face. 



3rdly. That the iris be fixed to the condenser fitting, the 

 turn out and rack work eccentric motion being removed. 



4thly. That differential gear be put to the fine adjustment, 

 so as to make it about three times slower than at present. 



^ 



Fi^.2. 



Fig.l. 



Fig.3 



ExPLAifi^TI-eN-OF-FlG^URES. 



Fig. 1. Slide carrying substage (plan). 

 ,, 2. The same (elevation). 

 ,, 3. Pinion and slide fixed to microscope (elevation), 



