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FIC RESEARCH. Nine: he. AOR 
m 01 ella Aine a Apts Peau ida. caused ig ey nivea, Schrot. rust 
ty. Puceinia Pimpinelle, Mart. Ata 
oa - graveolens, L., Rue: —leaf-spots caused by Sphepella Rhea, Fautr. | 
aes ay ‘Salvia officinalis. e Sage: —leaf-spots caused by Ascochyta vicina, Sacc.; stalk- 
B spots caused by Phona: Salvic, -Brun.; mildew caused by Oidium erysiphoides, Be 
RSLS Satureja hortensis, L., Summer Savory: —Rust caused by Puccinia Menthe, Pers. 
foggy: s ‘Sinapis alba, L., White mustard, and Sinapis nigra, L., black mustard: — Leaf-spots 
e. caused by ee Brassice, Ell. and By ; false pallens caused by Peronospora para- | 
3 _ sitica, Tul.; white rust caused by Cystopus candidus, DBy.; falling and rotting of the - 
a _ seedlings, Gear by Pythium ee Plesse; excrescences on roots caused by 
nm -saageaee Brassice, Wor. 
¥ _ Thymus vulgaris, L., Thyme: — Rust gated by Paes Menthe, Pers. 
_ Valeriana officinalis, ales Valerian: —Leaf-spots caused by Ramularia Valeriane, Sacc.; 
© Saitdew caused. by Werleike communis, Fr.; ; false mildew caused a Ie fe Valeriane, 
‘Trail; rust. caused by Uromyces. alerianes Fuck. 
: The few means with which the above- tHeationed diseases can be combated (blue 
- vitriol and: lime liquor, and similar liquids) lessen the value of the crop, so far as” 
: sewers, leaves, and stalks are concerned; and therefore their use is self-prohibitory. 
_ The only way left is to increase the resisting powers of the cultivated plants against 
diseases. This can occur, when races or individual plants of greater resisting powers — or 
_ possessing complete immunity wherever possible — are raised, and their powers of 
ac - resistance increased by suitable methods of culture. A- thorough discussion of this 
question of plant raising is found in the original work to which reference is now made. 
SS ARrr gt Be 
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eps ee ae Pye Phytophysiological Nates. | 
Sribe the. foe information on the amygdalin content of bitter almonds is very 
: "contradictory, #8 Rosenthaler has carried out a large series of amygdalin estimations 
on four various Ainds of almonds’). He found the hydrocyanic acid present in the 
~ almonds, from which he calculated the amygdalin content. It turned out that even 
es in the ‘same samples, which came in part from chemists and druggists, the amygdalin 
content varied. The contents in the medium. quality amounted to: 4.29 per cent., 
a 4.28 per cent., 3.43 per cent., 3.25 per cent.; those of the lowest quality: 2.50 per cent., 
a 244 per cent., 0.25 per cent., 2.09 per cent.; those of the best quality: 6.90 per cent., 
54 8.48 per cent., 5.25 per cent., 4,50 percent. With the three kinds the lightest almonds 
were richer in amygdalin than the heaviest; with the fourth kind, it was just the 
‘ opposite. The customary rule, that small almonds contain most amygdalin is valid, 
—- but not without exceptions. pyre , A ene. 
at Rosenthaler®) has also endeavoured to answer the much-raised question, in which 
- form hydrocyanic acid occurs in the vegetable kingdom. From his own investigations 
and information obtained from literature, he arrives at the result, that hydrocyanic acid 
ie found in plants in the combined form mostly as glucosides. Only in the combined 
- form, as the hydroxy nitrile glucoside, does the acid occur in bitter almonds, cherry 
z laurel leaves, linseed germs, peach leaves, the seeds of Phaseolus lunatus, L. and in 
— Sorghum vulgare, Pers. The small amount of hydrocyanic acid which has been found 
in the buds of Prunus Lawrocerasus, Me. and in the leaves of Sambucus nigra, L., is not 
_ combined with glucosides. 
ey Berichte d. deutsch. pharm, Ges. 30 (1920), 13. — *) Schweiz. Wochenschr. f. Chem.u. Pharm. 57 (1919), 571. 
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