THE AMERICAN HISTOLOGICAL STAND. 39 



this could easily be substituted for the more expensive 

 one furnished with the instrument. 



As to the smaller stage referred to, the author can 

 " speak by the card." He had used one of Mr. Zent- 

 mayer's army hospital stands for years, and the instru- 

 ment gave him good satisfaction. Two years ago, how- 

 ever, desiring a thinner and a revolving stage, he begged 

 Mr. Zentmayer to devise one and fit the same to his 

 stand. Quite a correspondence ensued, and the army 

 stand was thus equipped, the new stage being practic- 

 ally the same as the small one furnished with the Cen- 

 tennial. It worked nicely, and was, in truth, all that 

 the author desired. 



In the change of stages proposed, attention is called 

 to the fact that the smaller stage has not the graduated 

 edge. This to the majority of users would not be a 

 serious objection, while, on the contrary, many would 

 gladly avoid the cost of the graduated circle. 



Mr. Zentmayer makes some eight or nine different 

 forms of stands. We have room to describe only one 

 other, viz. : 



THE AMERICAN HISTOLOGICAL STAND. 



The requirements held in view, in the construction 

 of this little instrument, were the combining of the 

 facilities of a first-class stand with moderate cost. 



The entire instrument is made of brass, the base and 

 uprights are one piece, of a peculiar shape, and of great 

 rigidity, to which the bell-metal bar is attached by a 



