THE COMPOUND MICROSCOPE 21 



Mr. C. Baker, London, advertises a nature-study 



microscope, with one eye-piece and a combining 



objective giving magnification x 60, x 120, and 



x240 for £2 5s. The joint of this instrument' is 



not inchnable. 



The " Star " (Fig. 8), made by Messrs. R. and J. 

 Beck, Ltd., London, is also an efficient yet inexpen- 

 sive tool, worthy of favourable consideration by 



Fig. 8. — Beck's "Star" Microscope. 



begirmers. The cost, with one eye-piece and a 1-inch 

 objective, is about £3. The " London " model, 

 made by the same firm, is sound in every respect, 

 but it is more costly than the " Star." It can be 

 had in a comparatively simple form, or in increasing 

 degrees of elaboration. One form, having inclining 

 joint, coarse and fine adjustments, vulcanite-faced 

 stage, draw-tube with milhmetre scale, double 

 mirror, iris diaphragm, and substage collar, for 

 stand in case, is fisted at £3 5s. 6d. With the addi- 



