We promised at the commencement of the present year to give increased value to the SCIENTIFIC AMERICAN, both in quantity and quality of the illustrations and general reading, and added the hope that with the hearty co-operation of our many friends we should greatly increase our circulation. We have fulfilled our promise, and are happy to say that our hopes have not been disappointed. Numerous correspondents have expressed tp.eir satisfaction with oUI' paper in such hearty terms as show our efforts in their behalf are thoroughly appreciated. During the coming year we .shall take still another step forward, and shall devote increased attention to the illustrations of foreign inventions, machines, designs for machinists' tools, and all matters of general industrial interest, at home and abroad. In doing this we shall incur a large additional expense, but we are rt3olved to spare neither pains nor expenditure to make our paper the most plendidly illustrated industrial journal of the age. To reimburse us for this prospective expenditure, we must either increase our subscription list, or raise our subscription price. Our paper is now unparalleled in cheapness. Nothing approaching it in value is published anywhere in the world at our subscription price. Still we are resolved not to advance the rates. We rely upon the efforts of our friends to increase its circulation. Remember that for every subscriber you send us you will be remunerated in the increased value of the paper itself. Besides this remuneration we offer extra inducements in the cash prizes and splendid steel engraving, advertised in another column. The picture of some of the greatest geniuses of our age, is one which will adorn any gentleman's library, and nothing could be a more fitting ornament for an inventor's laboratory. Those who intend to compete for the premiums offered in another column should be wide awake. We have already received encouraging letters from subscribers who propose to get up clubs, and the prospect is good that the work will go bravely on. We are moving onward, Friends, and we mean to keep moving, and we here pledge ourselves that the SCIENTIFIC AMERICAN for 1870 shall keep march with the age in all that can adorn or improve it.