It is curious to see the estimate which the different journals place upon themselves as mediums of publicity, by comparing their charges for the same advertisement. Thus the contents of the _Quarterly Review_ for January, 1855, precisely similar as far as length is concerned, was charged for insertion as an advertisement by the different papers as follows:--_Times_, 4s.; _Illustrated News_, 1_l._ 8s.; _Morning Chronicle_, 5s. 6d.; _Morning Post_, 6s.; _Daily News_, 5s. 6d.; _Spectator_, 7s. 6d.; _Morning Herald_, 6s.; _Punch_, 15s.; _Observer_, 9s. 6d.; _English Churchman_, 5s. 6d.; _Examiner_, 3s. 6d.; _John Bull_, 5s. 6d.; _Athenæum_, 10s. 6d. Now the _Times_ did not "display" the advertisement as all the others did, it is true, and therefore squeezed it into half the space; but with this difference, its charge was absolutely the lowest in the list, with the single exception of that of the _Examiner_. How this moderation on the part of the Leading Journal is to be accounted for we know not; but the apparent dearness of the _Illustrated News_ meets a ready solution, and affords us an opportunity of showing how vastly the prime cost of an advertisement, during the present high price of paper especially, is augmented by a great increase of the circulation of the paper in which it appears, and what the advertiser really gets for his money. If we take the advertisement of our contents (_Quarterly Review_), it will be found to measure about one inch in depth; it is obvious, then, that we must multiply this measure by 170,000, the number of separate copies in which it appeared. Now 170,000 inches yield a strip of printed paper the width of a newspaper column--_upwards of two miles and three-quarters long!_ Thus we have at a glance the real amount of publicity which is procurable in a great journal; and with so remarkable a statement it will be well to close our paper. FOOD AND ITS ADULTERATIONS. A story is told of a European who, wishing to convince a Brahmin of the folly of his faith in interdicting, as an article of food, anything that once possessed life, showed him, by the aid of the microscope, that the very water which he drank was full of living things. The Indian, thus suddenly introduced to an unseen world, dashed the instrument to the ground, and reproached his teacher for having so wantonly destroyed the guiding principle of his life. We, too, have at home a Hindoo, in the shape of the believing British public, to whose eye Dr. Hassall nicely adjusts the focus of his microscope, and bids him behold what unseen villanies are daily perpetrated upon his purse and person.