A lecturing mania has invaded the ranks of the nobility of England. The Earl of Car lisle is announced to lecture on Gray, at Sheffield; the Duke of Newcastle is to lecture at Worksop; Sir Alexander Cockburn at Southampton, and Lord John Russell at Man chester. Nobility is looking up.— [Ex. [This is no new thing, Lord Mahon deliver ed a most beautiful lecture four years ago to the mechanics of Leeds, and the Earl of Car lisle (formerly. Lord Morpeth), has delivered some lectures every year to the mechanics in different parts of England. The conduct of these men confer dignity upon their position in society. No title but conduct can make a nobleman. The nobility of England at the present day present an amiable and"'commen- dable contrast to those of the last century.— Many ot them are laboring to lift working- men to their own positions in all that can make a man noble, viz., morality, intelligence and courtesy. We have often been surprised at the want of taste or desire for good information, or want of spirit, we do not know which, manifested by our mechanics in the different large cities of our great country. They would not like to be called ignorant, or stigmatized for exhibi ting a want of intelligence, nor would it be just to do so; for they are both spirited and intelligent, but we IJIust blame them for not directing their attention to objects which have a most elevating tendency, and which confer honor and dignity upon men. We allude to useful public lectures by eminent men. We honor the young merchants ot the City of New York, because they have the sagacity to per ceive and the spirit to carry out the object of obtaining • eminent lecturers every winter. Did they not engage the philosophic Nichol to deliver his splendid Astronomical Course, and this winter secure Thackeray, whose fame as an author is world- wide' l The gentlemen of the Mercantile Association, with a sagacity which does them credit, understand how to make their Institution popular. The city of New York contains a population of 500,000; the city of Glasgow, Scotland, contains a po pulation of about 365,000 ; both of them have Mechanics' Institutes; the latter is the oldest in the world, but at the same time the me chanics them do not possess the same means to maintain a good Institute as do those of our own city, but the following extract from the “ Scottish Guardian” will show how that In stitute is conducted :— ” The winter session, 1852-53 of this excel lent institution is about to commence; classes on the following interesting subjects are al ready announced—viz., Chemistry, by Dr. Frederick Penny; Nptural Philosophy, by Professor J. Scott; Popular Anatomy and Physiology, .by Dr. Alexander Lindsay ; Arith metic and Mathematics, by Professor J. Scott; and Mechanical and Architectural Drawing, by Mr. Robert Harvey." Can our mechanics not learn a lesson about rendering institutions devoted to their benefit popular and honored among the people 1