Next to England we should place Sweden and Denmark--for their population they have done much, and done it well; then Italy--in Italy science is well organized, and the rulers of her petty states seem to feel a proper emulation in promoting scientific merit--in which laudable rivalry the Archduke of Tuscany deserves honourable mention; America and Russia come next--the former state is zealous, ready at practical application, and promises much for the future, but as yet has not done enough in original research to entitle her to be placed in the van. Russia at present possesses few, if any, native philosophers--her discoverers and discoveries are all imported; but the emperor's zeal and _patronage_ (a word which we scarcely like to apply to science) is doing much to organize her forces, and the mercenary troops may impart vigour, and induce discipline into the national body. In this short enumeration, we have considered each country, not according to the number of its very eminent men; for though far from denying the right which each undoubtedly possesses to shine by the reflected lustre of her stars, yet in looking, as it were, from an external point, it is more just to regard the general character of each people than to classify them according as they may happen to be the birthplace of those "To whom all scenes of Europe homage owe." A misunderstanding of the proper use of theory is among the prevalent scientific errors of the present day. Among one set of men of considerable intelligence, but who are not habitually conversant with physical science, there is a general tendency to despise theory. This contempt appears to rest on somewhat plausible grounds; as an instance of it, we may take the following passage from the fitful writings of Mr Carlyle:--"Hardened round us, encasing wholly every notion we form, is a wrappage of traditions, hearsays, mere words: we call that fire of the black thunder-cloud electricity, and lecture learnedly about it, and grind the like of it out of glass and silk, but what is it? Whence comes it? Where goes it?"[26] [26] Carlyle on Hero Worship.