In some respects, Uncle Sam and Brother Jonathan are 'familiar as household words' on the lips of John Bull; but it may be safely affirmed, notwithstanding, that the English know less of the Americans than the Americans know of the English. We are in the way of meeting with our transatlantic cousins very frequently, and never without having our present affirmation abundantly confirmed. This mingled ignorance and indifference on the part of Englishmen to what is going on in Yankeedom, besides being discreditable, will soon be injurious, as any one may satisfy himself by a perusal of a couple of pleasant volumes from the pen of Captain Mackinnon,[2] who travelled through the States lately, with his eyes open, not to their faults only, as might have been expected in an officer of Her Majesty's navy, but to their virtues, attainments, and enterprises. He has been out spying the land, and brings back a report which, though not new to those in the habit of reading American newspapers, and talking with American visitors, will be both new and interesting--we should hope stimulative--to the majority of our countrymen. We shall fulfil a duty, and confer benefit as well as pleasure, by picking out of the captain's log-book some of the choicest samples of Uncle Sam's 'cuteness, which will serve to shew, at the same time, the progress and prospects of that great commonwealth. Captain Mackinnon believes the mind of the Americans to be the keenest and most adaptable in the world. They acquire information of any kind so rapidly, and have such ready dexterity in mechanical employments, that the very slightest efforts put them on a par with Europeans of far greater experience. After describing New York--which we shall return to, if we have space--the author gives the results of a visit to the dockyards at Brooklyn, Boston, and other places. Brooklyn 'contains perhaps the finest dry-dock in the world.' Here he saw all the latest English improvements improved! He was informed, on unquestionable authority, that no new instrument of war is elaborated in England, without being immediately known to the authorities in the United States; and that the commission of naval officers, now sitting at Washington to re-organise the navy ordnance and gunnery exercise, are assisted materially by the experience of men educated in Her Majesty's ship _Excellent_.