ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



657 



Petri dish, or a large section, can be examined without difficulty. The 

 mirrors are plane and concave. The foot is of solid brass, and admits of 

 any angle of inclination with perfect stability. When the Miscroscope 

 is used vertically the mirror and substage are conveniently adjustable. 

 The substage is perfectly centred to the objectives supplied with it, and 



Fig. 127. — Ready for Use. 



has a focusing adjustment by diagonal rack-and-pinion ; it has a swing- 

 out movement for changing the accessory apparatus. The instrument 

 represented in the figure has a horse-shoe foot. It can, however, be 

 supphed with a tripod foot, and is then listed as the " Oxford " model. 

 December 18th, 1912. 2 y 



