ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



511 



milled head of the horizontal movement is placed lower than the top 

 plate of the stage, and the other milled head is removable, so that large 

 slides or culture plates can be conveniently examined. The substage is 

 of the E.M.S. standard size (1*527 in.), and is provided with centering 

 screws ; the milled heads of the coarse and fine adjustments are so 



Fig. 125. 



placed that they can be worked without shifting the hand ; the plane 

 and concave mirrors are 2^ in. diameter. All the fittings are sprung, 

 and have adjusting screws to compensate for wear. The foot is of the 

 solid tripod form, and it has a bracket to support the stand when in a 

 horizontal position. 



C. Baker's Plantation Microscope (figs. 126, 127) is constructed 

 according to the advice of the London and Liverpool Schools of Tropical 

 Medicine, and is designed to enable missionaries, planters, hospital 



2 m 2 



