50 Improvements in Physical Science (Jan. 
Acids rendered the solution red, nitrate of silver rendered it 
carmine red. 
When this substance was dried and dissolved in lime-water, and 
separated by evaporation, ‘malate of lime remained in solution. 
When the lime was removed by means of sulphuric acid, and the 
malate of lime by means of alcohol, a-sweet-tasted substance re- 
mained, which would not crystallize. 
The pollen, when burnt, left an ash, which contained potash, 
magnesia, and lime. Thus the constituents of the pollen of tulips 
were as follows : 
Pollenin. 
A saccharine not crystallizable matter. 
A very little cerin. 
A violet-blue pigment soluble in water and alcohol. 
Malates of potash, lime, and magnesia, with an excess of acid. 
_ A trace of other salts with the same bases, 
Caseous albumen. — 
Theodore Von Grotthus has likewise published an analysis of the 
pollen of tulips (Schweigger’s Journal, vol. xi. p. 281). He does 
not seem to have been aware of what had been previously done by 
John, and did not obtain all the constituents mentioned by that 
chemist. According to the analysis of Grotthus, 26 grains of 
pollen of tulips are composed of the following ingredients: 
Fibrous vegetable albumen ....2.....eeeeecrecee DO BTSs 
Dried vegetable albumen ....2....ceceeevcceees 
Soluble vegetable albumen ......... wncseeeece es ee 
Malate of lime with some malate of magnesia ..... 34 
Malic acid’. .'..5. ccc cvccctercvcnsecenecses Et 
Malate of ammonia , 
Nitre? \ sole doo webs be 0660 clelgy eas a tue 
Fibrin 
26 
The two first substances in this table constitute in all probability 
the pollenin of John. 
6. Alcornoque—A new medicinal substance has been lately 
brought to Germany from Martinique. It is the root of an un- 
known plant to which the Indians have given the name of alcor- 
nogue. Dr. Rein of Leipzig has subjected it to a chemical analysis, 
He found it composed of the following constituents. (Gilbert’s 
Annalen der Physik, vol. I. p. 121) 
Goma asthe Sukie) Fisce's sidvresiaietisioes OUIOS 
Saponaceous matter .......ee-2-++5- O102 
Reseneiiet 4 ees. Sofa stt. teks eta cbine Ca Pats ile 
Volatile matter ...... tS Eiai'e plas eter AORN 
Pabeitioe eases ae © ‘atiele ss hliedcares celia ne ee 
‘Trace of tartaric acid - 
