50 PHOTOMICROGRAPHIC APPARATUS 



late Dr. Van Heurck. The apparatus consists of a vertical box-form 

 camera supported on four stout square legs, between which, and 

 immediately beneath the camera, the microscope is placed. The 

 whole is very, rigid, and we all know the magnificent work Dr. Van 

 Heurck and others produced with it. The chief objection, and, when 

 considered on optical grounds, to my mind not a very real one, is 

 that it precludes the employment of extended camera lengths. But 

 ten inches from the eye lens of the eye-piece to the focussing screen 

 of the camera is, I believe, the ideal extension for critical work with 

 modern objectives. In the Journal of the Royal Microscopical Socictij 

 for 1916, pages 258-9, I have figured and described a simple home- 

 made vertical stand to carry microscope and camera, and although 

 there shown as used for stereo-photomicrography, I have since used 

 it successfully for high-power work with the monocular microscope 

 with magnifications up to two thousand diameters. 



A vertical apparatus of good, rigid design is of such importance 

 for a great deal of microscopical research work that is being carried 

 out to-day, that it is a matter deserving the immediate and serious 

 consideration of our British manufacturers. 



