means of small flanged tubes with collars by means of cement, for producing a steam and water-tight joint between the said boiler tubes and the end plates of tubular steam boilers. Second, the construction and employment of a mandrel for facilitating the cleaning of tubes in tubular boilers. E. S. Boynton, of Alexandria, Virginia, for an improvement in iron masts, steeples, &c.: He claims the constructing of masts and spars, and such perpendicular structures as require height and stability, by means of filat bars of wrought iron or steel, made continuous by riveting the ends of the bars together, and winding them spirally around from the bottom to the top of the structure, one portion winding around in one direction and the other portion winding around in the reverse direction, so as to form spiral or diagonal braces throughout the structure, secured together at the points of intersection, and relying on said continuous braces for their support, without the aid of longitudinal or circular ribs or any internal framing, substantially as described. G. M. COOPER, of Litchfield, Michigan, for an improvement in press for packing wool: He claims the two adjacent vertical fixed sides, two adjacent hinged and movable sides, supporting and guide rods, sliding yoke, and piston, the whole being combined and operating together in the manner set forth. PHOTOZINCOGRAPHY, At a meeting of the British Association for the Advancement of Science, held in September last, Col. Sir H. JAMES, R. E., described the process of "photozincography," by means of which photographic copies of the ordnance maps are cheaply multiplied, either on their original or on a reduced or enlarged scale. The process is applicable to the reproduction of old manuscripts and old printed books. A copy of Domesday Book (the part relating to Cornwall taken by this means) was exhibited to the meeting. The process consists in taking a photographic collodion negative, which is intensified by means of bichloride of mercury and sulphate of ammonia. Paper deprived of its size is saturated with a solution of gelatine and bichromate of potash. The paper thus prepared is exposed to the light beneath the negative, the result of which is, that the parts which have been exposed to the light become hardened and insoluble. The whole is then inked with a greasy ink, and afterwards washed in water, which removes the ink from all the parts except those on which the light has acted. A transfer to stone or zinc is then taken in the ordinary way, and copies are printed. Sir HENRY JAMES then described an improvement which had lately been made in the process, by means of which a reduced copy of a map or plan could be made, in which the minor detail (which would be useless on a reduced scale) could be omitted, and the names of places and other features of the plan given in full-sized legible characters. H. E. MORING'S MONTHLY COFFEE CIRCULAR. Stock of Coffee at the five principal Ports of the United States of America, on the 31st of December, 1861. Stock 1st January, 1862, 6,107 tons, against 1st January, 1861, 9,149 tons. 1st December, 1861, 7,222" do. 1st December, 1860, 6,189 " 1st November, do. 1st November, 1st October, do. 1st October, 1st September, do. 1st September, 1st August, 14,211" do. 1st August, 1st July, 14,675" do. 1st July, 1st June, do. 1st June, 1st May, 6,971 do. 1st May, 1st April, do. 1st April, 1st March, do. 1st March, 1st February, do. 1st February, 1st January, 9,149 do. 1st January, " 18,595" Average for last 18 months, 0,752 tons, against the previous 18 months, 6,678 tons. Distribution in January, tons 9,659 12,484 Decrease, 3,042 tons, or 88 per cent. do. February, “ 11,841 10,640 Increase, 1,083" 4 17 do. March, 9,247 do. do. 5,859 4,663 do. 4,684 4,254 5,862 8,0486,872 September, 8,1806,748 October, 2,937 8,627 Novembr,“ 4,526 5,498 do. December, 5,4614,688 do. 20 do. do. 488 do. Total in 12 months,....tons, 80,290 80,968 do. first - months,.. Increaso, 4,079 tons, or 72 per cent. Average per month,.... 6,691 16,747 THE COFFEE MARKETS OF THE WORLD. Imports, Stocks and Distribution of Coffee in the five principal Ports of the United States, up to 31st December. Stocks, Receipts and Distribution of Coffee in the six principal Depots of Europe, up to 1st December. 50,850 58, 250 55,150 The Crop year of Ceylon, ending 30th September, yielded 30,169 tons, against 31,643 tons in 1860; 29,228 tons in 1859, and 27,632 tons in 1858, average of 29,665 tons in four years. H. E. MORING'S MONTHLY SUGAR CIRCULAR. Imports, Stocks and Distribution of Sugar in the four principal Ports of the United States, up to 31st December. * Including export of 24,599 tons from 1st January to 31st July-10 export since. Stocks, Receipts and Distribution of Sugar in the six principal Depots of Europe, up to 1st December. Stock of Sugar at the four principal Ports of the United States of America on the 31st of December, 1861. New-York, 20,886 876 1,426 17,514 94,544 21,264 86,822 Boston, 19,571 10,488 62,724 16,250 1,206 13,591 1,979 3,930 63,963 8,629 9,263 2,889 1,569 60,963 8,000 1,882 2,400 1,005 3,119 471 928 2,400 1,742 8,000 27,640 56,894 24,140 15,333 28,246 1,594 132,687 16,250 1,979 21,991 21,604 226,558 2,352 82,687 67,855 30,887 20,284 180,496 21,700 3,200 19,161 2,001 Decrease, 4,467 588 168 2,889 53,651 2,352 5,047 11,461 6,247 4,951 47,809 5,450 1,221 2,001 1861. 1860. Stock, 1st December, tons, 32,687 67,855 8,629 8,879 or 88 972 Increase, 33 or 3 Baltimore, Total supply, 45,800 76,734 1,751 Decrease, 9 or 1 Deduct stock, 31st Dec.“ 27,640 56,894 Total, 1st Jan., 1862, 27,640 tons, against, 1st Dec., 1861, 82,687 tons. Decrease, 5,047 tons, or 15 per cent. Distribution in Dec." 17,660 20,340 Distribution in Jan., tons, 19,446 14,043 Stock, 1st January, 1862, 27,640 tons, against, 1st January, 1861, 56,394 tons. Decrease, 28, 754 tons, or 51 per cent. Feb., 24,176 15,917 35,168 or 52 March, 28,872 21,846 April, 28,060 24,857 47,081 or 54 May, 38,980 40,059 1st September, 63,557 1st September, 109,106 45,549 or 42 ,735 28,165 1st August, 82,076 1st August, 95,050 12,974 or 13 29,383 40,381 88,169 Increase, 83,646 26,176 27,544 47,568 1st May, 53,701 13,580 or 21 14,525 82,719 1st April, 55,884 1st April, 30,831 25,053 14,206. 20,143 Dec., 17,660 20,840 1st February, 46,825 1st February, 18,930 16 27,895 or 147 or 134 Total in 12 months, " 297,738 332,209 first 11 Average for the last 18 mos., 65,986 tons, against the previous 18 months, 60,900 tons. Decrease, 4,914 tons, or 8 per cent. Average per month, 24,811 27,684 |