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SUMMARY OF CURRENT RESEARCHES RELATING TO 



Watson's New Histological Microscope. — Messrs. W. Watson 

 and Sons have designed this instrument for the nse of class students, 

 and it is sold at a very moderate price. 



It has the fine-adjustment introduced hy Messrs. Watson, and 

 hitherto confined to the larger instruments, and also a novel featuro 



in connection with the stage which is so simple that it is a little 

 remarkable that it has not been suggested before. This consists 



in adding to the stage two raised 

 parallel ribs on which the object 

 rests, and on which it can be readily 

 moved about. The surface of the 

 stage is thus kept free from scratches 

 and, what is more important, friction 

 is reduced to a minimum. 



Newton's Microscopic Attach- 

 ment for Lantern Projection. — 

 This is a simple apparatus to screw 

 on to the nozzle of any lantern in 

 place of the front lens, and with the 

 limelight it is claimed that it will show an ordinary microscopic slide 

 on the screen 8 feet in diameter far more brilliantly and better defined 



