THERE seems to be no end to great engineering projects, for, besides the underground railroad which has got a start, books are now open for subscriptions to form a capital stock of $6,000,000 for the purpose of cutting a ship's canal from New York to Newark. On the completion of the canal it is proposed to run ferry boats over it half hourly. The length of time which it is estimated a trip either way will consume is but 40 mintes—less time than it takes to go by rail at present from here to Newark. The proposed ferriage will be particularly serviceable to those who find it economical to do their transportation by team. The value of property alone to be created by its construction will reach, it is thought, between $13,000,000 and $13,000,000. A GOOD APPOINTMENT.—Commissioner Fisher has recent ly determined to place all interference cases under the charge of a single Examiner, to be specially designated for that work and relieved from other duties; and we understand that John M. Thatcher, Esq., Principal Examiner recently in charge of the class ol harvesters, etc., has been promoted to the place. The duties of Mr. Thatcher's new position are arduous and important, requiring for their successful performance a very high order of ability, with great industry and integrity. The Commissioner could hardly have made a better selection, and we are confident that the interests of inventors will be decidedly promoted by the new method of adjudicating thesa important cases. THE Century Plant, about to blossom in Rochester, N. Y., has reached a hight of 15 feet 9 inches, and will probably reach 30 feet. It has 30 branches and buds now visible, which are to bear the clusters. The lower branches are about 15 inches in length and 5 inches apart, where matured, and they gradually shorten until they reach the top. The lowermost arm is 11 feet 6 inches from the ground, and there are 105 distinctly formed buds in this cluster. We estimate there will be 1,500 flowers on the plant. The great beauty is the wonderful pyramidal form which it attains when in full bloom, the large clusters and numerous flowers in each, which will appear at the ends of the arms or branches, the lower ones being the longest, and gradually shortening in pyramidal form till they reach the top, where there will be a huge cluster of flowers. A CALIFORNIA journal announces with becoming gravity that the problem of aerial navigation is solved, and that, within a year, travel will be habitually carried on between San Francisco and New York, Europe and China, by aerial carriages. It says that within four weeks, the first aerial steam carriage, capable of conveying six persons, and propelled at a rate exceeding the minimum speei of thirty miles an hour, will wing its flight over the Sierra Nevada, on its way to New York and remoter parts. The notice here given is very short, but we do not doubt that our citizens will organize to give hospitable welcome to the celestial visitor. WE notice druggists' advertisements in some of our city exchanges of dry pure earth for surgical purposes. It is well known that earth has been used with great success lately as an application to putrid sores and ulcers. The earth kept for sale is not claimed to have any superior efficacy to other earth, but as it is difficult in large cities to obtain the proper quality of earth at short notice, its being kept in stock at apothecaries establishments, will prove a great convenience. ON the 39th June we received a package from California having been only seven days in making the transit. This is one of quite a number lately received from various parts of California which have been only from seven to nine days in making the passage. THE Tribune makes itself responsible for the statement that a man in Adair county, Iowa—name of the town not given—has invented a cannon which he claims will throw a proj ectile fourteen mil es, and has gone to Washington to get a patent. He proposes to offer it to the Government for $1,000,000. THE underground railroad corporation has already commenced business and $10,000 have been subscribed to begin work. The capita] stock is fixed, we believe, at $10,000,000, therefore there remains to be taken only $9,990,000 to complete a work which interests all New Yorkers. ALEX. T. STEWART returns an income for 1808 of $3,019,313, upon which he pays a tax of upwards of $150,000. A'm. B Astor returns an income of $1,073,313. Mr. Stewart is said to be the richest man in the world who has made his own money. CREDIT was inadv'ertently omitted to the excellent article on " Copper, Brass, and Iron tubes," page 39, present volume, which va8 copied from Engineering. IvAVA has been lnWi) to flow wror tt IttVer of aalies, mulnr-muh -vyMcli -wanis ta fn 'Hn- pnn-wndw.tjvity of rt ttiAfiS sftved t,hp if'f'