•JSG THE PRESIDENT'S ADDRESS. 



There is yet another item to mention which is in favour of the 

 short tube. It is that the length of arm required to reach 

 the coarse adjustment is so much less than in the long. Many 

 photo-micrographers feel this advantage to be so great that they 

 purposely use this stand on all possible occasions. 



In conclusion, after some years of actual experience iu this 

 special line of work, as well as with the microscope for all other 

 purposes, I think the ideal is to have a short-tube instrument in 

 which provision is made for rapidly lengthening it into a long- 

 tube one ; then objectives of both Continental and English make 

 can be used at pleasure. 



Journ. Qv.ekett Microscopical Club, Ser. 2, Vol. IX., No. 58, April 1906. 



