288 Proceedings of the Royal Institution. 
Lecture V. Friday, June 4, 
On the Progress of Improvement in the Opera. Remarks on Cosi 
fan Tutte continued. 
Lecture VI. Friday, June 11. 
Remarks on the Opera of Cosi fan tutte concluded. Character of 
Mozart. 
Prospectus or Mr. Branpe’s LecturEs ON VEGETABLE 
CHEMISTRY. 
Lecture J. Saturday, May 8. 
Objects of this department of Chemical Science—Of the structure 
and growth of Seeds—Influence of air and water upon Vegetation— 
Of heat and light—Structure of the root, trunk, branches and leaves— 
peculiar functions of the latter—Their influence upon the constitution 
of the Atmosphere. Growth of aquatic plants. Relative effects of 
different plants upon the soil in which they vegetate. Of the sap of 
plants and the theories of its circulation. 
Lecture II. Saturday, May 15. 
Methods of Chemical Analysis applicable to organic products— 
Destructive distillation—Methods of purifying the vinegar furnished 
by this process.—Production of coal gas.—Ultimate composition of 
several vegetable substances—How far consistent with the theory of 
Proportionals?—Use of chlorine in these analyses. Means of dis- 
covering the immediate or proximate principles of vegetables by the 
action of solvents and tests—Properties of starch—gluten—gum— 
sugar. Mutual conversions of these substances into each other— 
Relative nutritive powers of different vegetable subsiances used in 
food. 
Lecture IIT. Saturday, May 23. 
Chemical history of the proximate principles of vegetables con- 
tinued—Of the different kinds cf oil—Economy of oil gas illumination. 
Manufacture of soap—Volatile oils—resins—-guaiacum—gum-resins 
—balsams—Of the astringent principle in vegetables, and its appli- 
