PRACTICAL WORK. 333 



The best microscopes obtainable are those made by 

 Carl Zeiss, of Jena ; and excellent instruments are 

 supplied by other German makers. 



Before purchasing either microscope or microscope 

 preparations, however, the student should obtain price 

 lists from several firms at least, and should not attempt 

 to obtain either second-hand, unless he has consider- 

 able experience in microscope work. Improvements 

 are being constantly introduced, and prices constantly 

 lessened, so that the newest instruments and apparatus 

 are usually the cheapest as well as the best. 



The following may be named as dealers in zoologi- 

 cal specimens, such as crayfish and amcebse, and in 

 skeletons, etc. : — 



T. Bolton, 62, Balsall Heath Boad, Birmingham. 

 F. S. Leaoh, 3, Great St. Andrew's Street, Bloomsbury, 

 London, W.C. 



E. G. Mason, 24, Clapham Park Eoad, Clapham, London. 



The human skeleton, either the whole or separate 

 parts, and the skeletons of the cat, dog, rabbit, 

 pigeon, and frog, may be obtained from the Medical 

 Supply Association, 12, Teviot Place, Edinburgh, and 

 those of many other animals, from Chapman & Hall, 

 Limited, 11, Henrietta Street, Covent Garden, Lon- 

 don, W.C. 



The reagents necessary for the course of work indi- 

 cated in Huxley & Martin's Biology, may be ob- 

 tained from several of the above firms. 



