122 



NOTES ON NEMAS 



along this line will lead to important results, and that the nemas may 

 become classical objects in cell and general physiology, as they have 

 already become in sex physiology. 



A new and rather extensive nomenclature will become necessary. 

 It will be needful to distinguish between the results of intra vitam, 

 intra mortem and post mortem staining; for these three terms, the last 

 two new in this connection, represent as many different phases in the 

 reactions that take place during the course of the experiments. As 

 the cells lose vitality, new color reactions occur, and the death of the 

 cell is followed by further equally marked changes in the reactions. 

 The cell elements I have mentioned vary in size, but most of them 

 are exceedingly small, many so small 

 that they are on the limits of visibility 

 using the very best instruments with 

 the greatest skill and under the most 

 favorable conditions. On the other 

 hand, some of them are large enough 

 so that they can be examined in con- 

 siderable detail and their structures 

 made out. Among them are the bodies 

 currently referred to under the name 

 mitochondria, and other more or less 

 synonymous words. 



As it will be some time before we 

 can establish a rational nomenclature 

 for these numerous intracellular struc- 

 tures it is desirable meanwhile to adopt 

 terms that will permit intelligent dis- 

 cussion of our discoveries as they are made. While the principles un- 

 derlying such a nomenclature are easily defined, it is by no means 

 easy, in the present condition of things, to suggest suitable short and 

 expressive loots to be used as a basis. In the long run there'll be 

 less confusion if meanings of the terms first employed relate to form, 

 size, and position rather than function. 



Investigations of this character are not unlikely to stimulate further 

 research in connection with aniline derivatives. Present efforts are 

 directed toward the discovery of dyes of greater or less permanency. 

 Permanency, however, is of little moment in these investigations; 

 what is of moment is the chemical and physical nature of the dyes. 

 No doubt dyes of a greater range of composition can be produced if 



Fig. 6. Diagram of a pair cf objectives, 

 the lower used as a condenser for the upper. 



