1900] MICROSCOPICAL JOURNAL. 229 



and great care should be taken that the animals are al- 

 ways in fluid, and not allowed to become dry in the pro- 

 cess of mounting ; but the results are excellent, to objects 

 having all the appearance of living animals, the colors, in- 

 ternal structure, and outward form being beautifully pre- 

 served in situ." 



Baker's Plantation Microscope. — This is a cheap mi- 

 croscope designed for use by planters, missionaries, and 

 others who have no practical acquaintance with the micro- 

 scope, for the detection of the ova of intestinal parasites 

 so common in men and animals in the tropics. It is ac- 

 cordingly simplified to the last degree ; there is one ob- 

 jective and eyepiece, giving a total magnification of 150 

 diameters, and the focussing is done by rotating the op- 

 tical tube, which gives a vertical movement by means of 

 a spiral slot and pin. There is a mirror, but no draw-tube, 

 fine adjustment, or condenser, and the stand is a plain 

 non-inclinable one. It fits into a tin case 9 x 2f x 2i inch- 

 es, which contains also a supply of glass slips and cov- 

 ers, together with a sheet of printed instructions illustra- 

 ting the eggs of Ankylostome, round and whip worms, Bil- 

 harzia and Distome ringeri, also of Amoeba coli andTry- 

 panosomes. We do not know what demand there may be 

 in the tropics for an instrument of this sort, but it is cer- 

 tainly designed to stand the maximum of bad usage with- 

 out ill-effect, and should prove sufficient for its purpose. 

 We would scarcely recommend it, however, for any other 

 than the purpose for which it is designed. The price com- 

 plete is only $11.00. It was recently exhibited before the 

 Royal Microscopical Society. 



Baker's R. M. S. Microscope. — Mr. Charles Baker has 

 recently brought out a new microscope, especially de- 

 signed for advanced workers, which both in design and 

 workmanship deservesnotice in these columns. The stand 

 is of the solid tripod type, which, whilst giving nearly as 

 firm abase, even in the horizontal position, as the true 



