14 ART. 3. T. ICH IM Uli A : ON THE FOKMATION OF 



those of antliocyan. (Fig. 14). They dissolve in hydrochloric, 

 acetic, and other acids to form a red solution. With sulphuric 

 acid, however, no sooner are they dissolved, than they reajopear 

 as red brownish amorphous granules. Potash dissolves them into 

 a pale green solution, whilst chloral hydrate dissolves them 

 without any special change of colour. They are, no doubt, 

 identical with Zimmermann's "pigment secretion" and Krœmer's^^ 

 "violet chromatophore," which are generally considered as somo 

 tannin compounds of antliocyan. Hitherto the crystal form of 

 antliocyan in a living cell has been but little known. Besides 

 the two writers above named, Husemanir^ had enumerated the 

 plants in which " j^igi^i^^^t corpuscles " (Farbkörper) occur. Stras- 

 burger's " l^lue star," consisting of short needles of crystallized 

 antliocyan, is found in many cells of the blue coloured calyx-leaf 

 of the Delphinium- flower. It is identical with Zimmermann's 

 "pigment secretion." 



A peculiar body, the so-called refractive globule, is found 

 constantly in this last phase within each epidermal cell of the 

 calyx-leaf of the Japanese Hortense. (Fig. 13.). It a.ppears, at 

 first, as numerous line drops around a nucleus, which gradually 

 unite into one large refractive globule, measuring 4-5 1'-. It is 

 stained by alkannin, coloured a light brown by sulphuric acid, 

 and is insoluble in alcohol, hydrochloric and acetic acids. This 

 body closely resembles Krœmer's " strong refractive globules " 

 found in the coffee-berry, and only differs from it in being almost 

 insoluble in chloral hydrate and alcohol (5: 2). Aqueous ammonia 

 ]:»roduces no reaction with it. Probably it may be a certain 



1) Krœmcr, K. — Ueber das angebliclie Vorkoiuinen vmi violrtten Cliromatoplioren. (lîot. 

 Cent, iiiatt. Nr. 41. T.d LXXXIV. 1900). 



-) Hiisciiiann, Th.— Die rilanzeubil.()lié. löS".', Hd I, ]>. 'lîM. 



