13G APPENDIXr 



SIMARUBEiE. 



Quassine. 



Oliveri and Denavo give the following mode of preparation of 

 quassine {^Gaz. Chlm, Ital,^ No. XIV.): Infuse for six liom's 10 kilo- 

 grams of powdered quassia with 45 liters of boiling water, taking 

 care to retain the heat. Decant the liquid and make a second 

 infnsion. Unite the liquors and evaporate to 10 liters, filter and 

 precipitate with q, s. of tannin. Place this impure tannate of quas- 

 sine upon a filter, wash carefully, dilute wdth water, treat with 

 carbonate of lead, and dry in a water-bath. Treat the tannate of 

 lead and quassine two or three times with boiling alcohol, and distil 

 the nnited liquors. The residue deposits crystals of quassine mixed 

 with resinous matter. Purify by repeated crystallizations in alcohol 

 and water. Thirty kilograms of quassia give 10 grams of pure 

 crystallized quassine. Evaporations should be made slowly and 

 alkaline reactions should be avoided. 



BURSERACE^. 

 Chemistry of Myrrh. 



Dr, Oscar Kohler publishes the results of a chemical examination 



Myrrh 



1801, p. 291): Ash 2-79 



per cent., portion soluble in water 57 to 59 per cent., consisting of a 

 gumj C^H^^O^. The portion soluble in alcohol was a mixture of 

 resins. The greater portion was an indifferent soft resin (C) soluble 

 in ether, C^'H'^0^ Two bibasic acid resins, one (A) C'^H^"0% 

 and the other (B)* O^'^H-^O^ The essential oil 7 to 8 per cent, ; 

 the principal constituent corresponds to the formula C^®H^*0. If 

 the formula for A resin be doubled, aU three formulae wiU contain 26 

 atoms of carbon, and the resins differ in the amount of oxygen they 

 contain 



Indifferent resin C = C^^H'^O^ (OH) 



Resin acid B = C^'H^^O^ 



Resin acid A - C^'^H^^O^s. 



MELIACE^. 



Naregamiaalata. 



Naregamia has been physiologically investigated by Dr. Stefan 

 ihoengutof Vienna. He used it in 24 cases, namelv.one of dysentery 



