330 Tue MICROSCOPE. 
spent, with two hundred magnified objects open for inspection 
at one and the same time. 
Dr Lucien Howe, of Buffalo, gave an entertainment to the 
members at his home on Wednesday evening, and the local com- 
mittee offered the Society the choice of an excursion to Niagara 
Falls, or an excursion upon those noble waters before they pre- 
cipitated themselves down the thundering cataract. The latter 
was chosen, and on Friday afternoon the steamer bearing the 
delighted guests, with a goodly number of citizens, left the wharf 
at the foot of Main street and landed several hours subsequently 
at the Macomb, a superb resort, where a banquet was abundantly 
enjoyed, and where the concluding exercises of the meeting were 
held. 
Dr Mosgrove, on account of urgent personal duties, resigned 
the treasurership and Mr C. C. Mellor, of Pittsburgh, Pa., was 
elected to fill the vacancy. Dr Geo. E. Fell, of Buffalo, was made 
president for the ensuing year. The time and place for the next 
meeting were left to the Executive Committee. 
Thus was passed one of the most profitable and enjoyable 
meetings the Society ever held. 
NOTES ON THE MICROSCOPE STAND, AND SOME OF 
ITS ACCESSORIES. 
AN AMATEUR, 
Ill. 
THE COARSE ADJUSTMENT. 
This part consists of the rack on the body tube, the pinion 
with its cogged wheel acting in the depressions or teeth of the 
rack, and the milled heads on each side by which it is manip- 
ulated. Its action is to raise or lower the body rapidly so that 
the objective may be approximately focussed, or be lifted above 
-the stage when the slide is to be placed in position, so that the 
two may be in no danger of coming in contact, with the possible 
injury of one or the other. 
The rack should be as long as possible, so that the body’s. 
movements shall be ample for all exigencies. A length of from 
four and one-half to five inches is none too great. And its 
motion should be, as some one has said, “as smooth as oil.” A © 
coarse adjustment mechanism that is noisy when in action, that 
