66 D. G. SIMONSEN, E. ROBERTS, P. R. WHITE 


a — 
Figs. 7-16. 7 and 8, carrot, 200 mg; g and 10, pink periwinkle, 75 mg; 11 and 12, Boston ivy, 
25 mg; 13 and 14, cactus, 200 mg; 15 and 16, Virginia creeper, 200 mg. 
D> 
would give good chromatograms. In Figs. 1-6 are shown the chromatograms ob- 
tained from extracts of two separate cultures of three normal tissues which had 
been grown in tissue culture for 2 months prior to harvesting. There was a remark- 
able constancy of pattern of detectable constituents in a particular species: Figs. 
rand 2, Rubus fruticosa (raspberry)*, Figs. 3 and 4, Scorzonera lispanica (salsify)**, 
The footnotes give the name of the investigator who first isolated the cultures and the place 
and approximate date on which the isolation was performed. 
* Morel, France, 1945. 
** Gautheret, France, 1945. 
References p. 68 
