96 



DR. LOUIS ELSBEPvG. 



is represented in fig. 6. The latex oozing out of the stem 

 proved to be composed of a viscid, as if mucous, colour- 



FiG. 5. — Hair of flower of I<oiimbergia, stained with gold chloride. 



less liquid, in which were suspended innumerable isolated 

 granules of a high lustre, somewhat similar to that of fat ; 

 gold chloride staining made the smallest granules appear dark 

 violet, while the larger were only indistinctly coloured, re- 

 taininuf their high lustre. Transverse sections of the stem, 

 examined in dilute glycerine, showed chlorophyll-granules and 

 the reticular structure. The parenchyma of some specimens, 

 especially those treated with strong alcohol, plainly exhibited 

 the layer of living matter in the interior of the " cell," which 

 Von Mohl called " Primordial utricle,-" and sacs, more correctly 

 " protoplasmic sac ;" and in many cases the bioplasson mass 

 showed the reticular structure. Treatment of gold chloride 

 not only rendered the network of many bioplasson bodies 

 distinctly visible, but in some cases offshoots emanating 

 from such bodies were seen to penetrate more or less far into 

 the cellulose investment; what has been sometimes de- 



