ON STAINING FLUIDS, AND STAINING. 131 



2. The smooth and even motions of its slides. 



3. Its moderate size and weight and correspond- 

 ing portability. 



4. The great range of section thicknesses, from 

 to 40 mm. 



5. Its applicability to large sections up to 5 x 5 

 cm. 



6. The forward movement of the specimen en- 

 tirely above the knife. 



7. The easy adjustment of the specimen in every 

 direction. 



8. The production of absolutely fiat and even 

 sections, &c., &c. 



Model III. 1 can be used for cutting specimens 

 embedded by the celloidin process, for the ether 

 freezing process and for " immersed " cutting. 



Vegetable Tissues 



and specimens can be preserved for an indefinite 

 time and for sectionising in 1 part glycerine, 1 part 

 alcohol, and 1 part water. This, however, applies 

 to such specimens as are not readily obtainable, and 

 which therefore must be kept in stock. When 

 practicable these tissues should be gathered and cut, 

 by the freezing process, whilst quite fresh, as in 

 this way the best results will be secured and all 

 distortion or shrinkage avoided. 



1 This new microtome also can be obtained from Mr. C. 

 Baker, 244, High Holborn, London, W.C. 



