Royal Institution of Great Britain, 4Sfl 



Geometry to the Arts. Perspective, how connected with regular Lines. Aerial Per- 

 spective. Colours. Their real number and absolute character. How primitives are 

 ascertained. What are the Compound Colours. The association, simplicity, oppo- 

 sition, harmony, and discord of Colours, illustrated by Diagrams of a novel character. 

 How Colours have been employed by the different Schools, and have become cha- 

 racterised so as to be distinguished. 



Lectuue IV. Thursduif, May Xbth. On Chiaro Oscuro, or Light and Shade. 

 Its influence on subjects that demand it, and on others that do not. The Masters 

 who have excelled in this Science. Those who have erred. On the sublime powers 

 of this Science. The consequence of the want of effect in the Stanza.5 of Raphael. 

 The great knowledge Rembrandt had of this, powerful part of the Art. 



Lectlrk V. Thursday, May 22nd. On Composition and Invention. The dis- 

 tinction to be made. Of the varieties of Composition and Invention. The fine taste 

 of the Greeks in the art of (/omposition. Ttie Artists who have excelled most in 

 Scientific disposal of subjects. The principles of Leonardo da Vinci, Raphael, 

 Michael Angelo, the Caracci. Domenichino, Guido, Albano, Nicolas Poussin. The 

 graces and mysteries of Science connected with Art. On Style and Manner, with 

 their consequences. Illustrations. 



Lecture VI. Thursday, May 2^ th. On Expression, Grandeur, Sublimity, Sim- 

 plicity, Grace, and Beauty. Illustrations from Michael Angelo, Raphael, Correggio, 

 and other Masters of eminence. Descriptions of some of the magnificent works of 

 the Ancients. Those of Phidias, Apelles, Zeuxis, &c. Causes wiiy the Phigalian 

 Marbles, though ill executed, and worse proportioned, are considered by Amateurs 

 as noble works. Retrospective Sketch of the foregoing Lectures. 



On the Natural History of Fishes. By J. Harwood, M.D., F.R.S., 

 F.L.S., Professor of Natural History at the Royal Institution, &c. 



Lecture I. Friday, April 18//^. Peculiarities in the general Structure of Fishes 

 — their Organs of Motion, and of Sense — great Division of the Class — the Cartila- 

 ginous Tribes — Structure and Economy of the Lampreys, and Shark genera. 



Lecture II. Friday, April 2bth. Cartilaginous Fishes continued — Shark*— 

 Rays — Torpedos — Sturgeons — Bony Fishes — Diodons — Tetrodons, &c. 



Lecture III. Friday, May 2nd. Structure, and general Economy of Bony P^ishei 

 —Soft-finned Abdominales — Salmons — ^Trouts — Fisheries — Herring genera, &c. 



Lecture IV. Friday, May 9th. The Abdominales continued — Pike and Cfcrp 

 Families, and genera — Gold Carp — Silurus, &c. 



Lecture V. Friday, May \6th. The Jugulares — Cod Tribe— Fisheries — Flat 

 Fi>hes— Sea Fishes naturalized in Fresh Water. — Sucking Fishes— Lump — Remora 

 — Apodal genera — Eel — Muraenae, &c. 



Lecture VI. Friday, May 23rd. Spiny-finned Fishes — Perch — Mullet — ^Wolf 

 Fish — Gurnet — Mackarel — Dory — Chaetodon, &c. &c. — Conclusion of the Course. 



On the Operations of the Laboratory. By Michael Faraday, Esq., 

 F.R.S., Corr. Member of the Royal Academy of Sciences, Paris, 

 Director of the Laboratory, &c. &c. 



Lecture I. Saturday, April Idlh. General Nature of Laboratory Operations — 

 Utility of Mechanical Division — Methods of effecting it — Separation of Powders- 

 Influence of Division over Chemical processes. 



Lecture II. Saturday, April 2C}th. Relation of Mechanical Division to Solution 

 — Solubility — its Nature and Advantages — Solution effected, modified, and applied. 



Lecture in. Saturday, 3Iay 3rd. Solution continued— Digestion — Nature and 

 Advantage* of Crystallization — Its applications in Chemistry. 



