THE PRESIDENT'S ADDRESS. 285 



It has been said of my own profession that its members mostly 

 prefer the English stand because it looks so much more important ; 

 but this is a libel, for I think the reason you see it so often in the 

 consulting rooms of the older men is because it was bought years 

 ago, when the shorter one was not in favour. 



With the ordinary amateur, the form of stand which he uses does 

 not seem so much to matter, because he can always incline it if 

 found too high ; but if he be one who is obliged to use his stand 

 vertically because of the employment of fluid media on the 

 stage, then he will, no doubt, prefer the Continental form. 



As regards the use of the two stands in photo-micrography, 

 another point comes to the front of which I have not yet spoken. 

 Owing to the optical tube-length being so much shorter in the 

 Continental instrument, the actual magnifying power of the 

 objective is much less. Consequently, the ocular must be more 

 powerful in the short than in the long tube to produce the same 

 amplification with the same focus objective. Now, conversely, if 

 it be desired to obtain the lowest magnification possible for the 

 sake of the large-sized field afforded thereby, this can be more 

 easily obtained with the Continental than with the English model. 

 This is of importance : sometimes one may be just unable to get 

 an object entirely in the field, even with the lowest ocular, when 

 using the long tube ; but by employing the short-tube objective 

 of the same focus, the photographer may be enabled to obtain the 

 desired effect— in other words, he can just get the entire object into 

 the field of view, which he could not do before. There is, however, 

 the opposite side of the question. Should he desire to obtain the 

 fullest amount of magnification with the objective in use— just, 

 perhaps, beyond that afforded by the greatest extension of the 

 camera when using the short-tube objective and the highest 

 ocular— he can always get one and a half times as much with the 

 same camera extension and ocular by changing the objective for 

 one of the same focus adapted for the long tube, if he has the 

 longer stand available to put it on. 



