219 



repeatedly rectifying with hydrated potash and retaining the 

 portion which distils first. — Colourless, thin, smells like elemi, has 

 a pungent, acrid, pepper-like taste; of 0-858 density; boils at 

 154° to 160°. 



TolublllsaiU. Exudation of the stem of Myroxylon toluiferum. 

 In the fresh state thickish, yellow, becomes slowly darker and 

 solid, has a very pleasant smell. The dry balsam is also named 

 Opobalsamum siccum. Consists of resin, volatile oil, and cinnamic 

 acid. The resin dissolves readily in alkalies, and has the formula 

 Cis Hio O 5 . The volatile oil, obtained by distilling the balsam 

 with water, contains a hydrocarbon (Tolen - Coo Hio). 



ToncacampliOl^ Cumarin. 



Tra|>'acaiitU-siibstauce = Bassorix. 



Trehalose = C12 Hn On + 2 HO. Peculiar kind of sugar in 

 the trehala-manna of Syria, an amylaceous substance, gathered by 

 coleopterous insects, and converted by them into a cocoon, con- 

 sisting of about 66% starch, 5 gum, and 29 Trelialose. The latter 

 forms rectorhombic crystals, has a less sweet taste than cane-sugar, 

 loses at 25° to 30° partly, at 100° completely, 2 equivalents water; 

 fuses on rapidly heating to 100°; l)ut is not fused even at 180°, if 

 desiccated before. Dissolves readily in water, is almost insoluble 

 in cold, soluble in boiling alcohol, not in ether, ferments with yeast 

 very slowly and incompletely; is not altered through boiling with 

 alkalies, alkaline earths and alkaliiie tartarate of copper; yields 

 with nitric acid, oxalic, but no mucic acid, is carbonised on heating 

 with concentrated sulphuric acid, becomes converted into grape- 

 sugar by heating with diluted sulphuric acid, is precipitated by 

 ammoniacal acetate of lead. 



Trinietliylaillin = Ce H9 N (isomeric with propylamin and 

 formerly confounded with it). Volatile alkaloid of the herb of 

 Chenopodium olidum, of the flowers of various Pomacere (for 

 instance, Crataegus coccinea, C. monogyna, C. Oxyacantha, Pyrus com- 

 munis, P. aucuparia), of the seeds of Fagus sylvatica, of the ergot, 

 of the rust fungus of wheat. Is obtained by distilling with a fixed 

 alkali and water, saturating the distillate with sul})huric acid, 

 evaporating, shaking the salty mass with ether-alcohol, removing 

 the svilphate of ammonia by filtration, evapoi-ating the filtrate, 

 shaking the residue with potash-ley and afterwards mth ether, 

 decanting the ether and evaporating the ethereous solution in a 

 vacuum. — Colourless liquid of a nauseous, ammoniacal, herring-like 

 odour; precipitable by tannic acid, bi-iodide of potassivmi, chloride 

 of mercury and iodide of potassio-mercury, soluble in water, alcohol 

 and ether in every proportion. 



[Triticill=Ci2 Hn On. Contained in the juice of the noots of 

 Tiiticum repens. — A tasteless, amorphous, gummy substance, 



