







, 















tN VEGETABLE BJOLOGY. 









523 



wise explicable. More in point is the fact that Eichter* showed 

 W»e probability of the existence of proteid 





in the wall of fungus- 











cells and that Nencki f has found proteids in the wall in the Bac- 

 eria (mycoprotein and anthraxprotein) ; while ForsseU J, shortly 

 alter Wiesi.er, by means of Baspail's and Millon'a reagents, dis- 

 covered proteid in the wall of certain Licheu-byphse (Lobariapul- 

 TTj™' Pelti 9 era canma) and Alga? ( Qelidium cartilagineum, 

 Acklonia iaccata, &c). We owe to Krasser an extended research 

 upon this subject. He first made a careful study of all the non- 

 proteid bodies which give one or more of the proteid reactions : 

 thus he find 























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ne -Xanthoproteic reaction, given by Ty rosin, certain resins and 











alkaloids. 









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Millon's reaction, given by starch, cotton-wool, and gum-arabic 

 (as Millon himself found), Tyrosin, Phloroglucin, Phenol, 

 Thymol, Vanillin, JSTaphthol, Nitrobenzole, and aromatic 





oxy acids. 











RaspaiVs reaction, given by oil, certain fats, Tyrosin, Phenol, 



Thymol, Naphthol §. 









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Fronde's test (blue colour with Molybdic Acid and Hydric 

 Sulphate), given by Glycerin, Tyrosin, Mannite, gums, 

 cane-sugar, Phenol, Phloroglucin, Thymol, Vanillin, 

 Coniferin. 



















Jtrasser's Alloxan reaction (purple-red colour with watery 

 solution), given by Tyrosin, Aspartic Acid, Asparagin. 



The upshot of Krasser's labour was the conviction that living 

 protoplasm is present in the cell-wall of Fungi (hyphae of Poly- 

 porus sulphureus and JP. fomentarius and of several Lichens), 

 Aigaa (Chondru* crispus, Gladophora and (Edogonium spp., &c.) 





(fail 



ure with Chcetophora, Spirogyra, Zygnemd), Chara, leaf-cells 



°f Polytrichum, several Vascular Cryptogams, meristetn of Pha- 

 nerogams (vegetative point, pericambium, phellogen), epi- and 







Sitzimgsb. d. Wiener Akad. Band 83. 



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t Jouru. f. prakt. Chemie, Neue Folge, xx. f and Ber. d. deutscb. chein. Geseli. 

 Jahrg. xrii. . bo th quoted bv De Bary, ' Voriesungen iiber Bactcrien,' Engl, 

 tfanal. p. 4 



t Sitzungsb. d. Wiener Akad. Band 93. See also Fremy, Ann. 8c. Nat. 6 ser. 

 13. 









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§ Precipitates are formed in these last two cases ; they constitute Molisch's 

 Sugar-reactions (violet with naphthol rusty-red with thymol ; vids Molisch, 

 ^ d. t Akad. d. Wiss. Wien, 1886, p. 97). 



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