The subject is a curious change in the formation of Lobsters from various species of the Winkle, the Winkle being considered the larva;.
The only advantage J.C.desires from the communication is, the credit of advancing his proofs, and the stimulating further enquiry .-- A line addressed to J.Cleghorne, Architectural Engraver, No.

19, Chapman-street, Black-road, Islington, will have immediate attention." It is sincerely to be hoped that proper notice will be taken of this advertisement, for in times of general scarcity like the present, such a discovery might be turned to great national advantage, by the establishment of proper depots for the cultivation of lobsters, as we have preserves for game, &c.
2 Cast-iron has become an object of general utility.

The Southwark or New London Bridge consists of three arches, the centre of which is a span of 240 feet, and the other two 210 feet each; the Vauxhall Bridge consists of nine arches, over a width of 809 feet; and it is a fact, that a Sugar-house is building with cast-iron floors, window-frames, and rafters, to prevent fire.

Cast-iron holds fire and resists fire; but it is probable that all its properties and powers are not yet discovered, and that we may some day or other witness the ascension of a cast-iron balloon inflated with steam! ~126~~coaches running, and barges, packets, and sailing-boats navigated, by Steam{1}--St.Paul's, as you perceive, without its ball--smoke burning itself, and money burning men's consciences." "Well done, Sparkle!" cried Tom; "your ideas seem to flow like gas, touch but the valve and off you go; and you are equally diffusive, for you throw a light upon all subjects." Bob was now suddenly attracted by a full view of himself and his friends at the further end of Everington's{2} 1 Steam--Here is a subject that evaporates as we approach; it soars beyond finite comprehension, and appears to be inexhaustible--every thing is done by it--machinery of every kind is set in motion by it--a newspaper of the most extensive circulation in the kingdom is printed by it, and the paper supplied sheet by sheet to receive the impression.
Tobacco is manufactured, and sausage-meat cut, by steam-- nay, a celebrated Vender of the latter article had asserted, that his machinery was in such a state of progressive improvement, that he had little doubt before long of making it supply the demands of his customers, and thereby save the expense of a Shopman; but, it is much to be regretted, his apparatus made sausage-meat of him before the accomplishment of his project.
Considering the increasing, and by some Philosophers almost overwhelming population of the country at the present moment, it is certainly an alarming circumstance, that when employment is so much required, mechanical science should so completely supersede it to the injury of thousands, independent of the many who have lost their lives by the blowing up of steam-engines.

It is a malady however which must be left to our political economists, who will doubtless at the same time determine which would prove the most effectual remedy--the recommendation of Mr.Malthus to condemn the lower orders to celibacy--the Jack Tars to a good war--or the Ministers to emigration.
2 If an estimate of the wealth or poverty of the nation were to lie formed from the appearance of the houses in the Metropolis, no one could be induced to believe that the latter had any existence among us.