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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.

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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.

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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.

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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.
do.
April,

5,859 4,663
do.

do.

4,684
do.

4,254 5,862
July,

8,0486,872
August, 5,644 4,056

September, 8,1806,748
do.
68

October,

2,937 8,627
89
do,

Novembr,“ 4,526 5,498
45

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.

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Stocks, Receipts and Distribution of Coffee in the six principal Depots of Europe, up to 1st December.

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50,850 58, 250 55,150

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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.

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* 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.

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Stock of Sugar at the four principal Ports of the United States of America on the 31st of December, 1861.

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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
746

1,569
Philadelphia,

60,963

8,000 1,882 2,400

1,005 3,119 471 928
Baltimore, ...
1,441

2,400
214
1,267 12,000

1,742
7,690 1,209 2,858 9,000

8,000
Total, 31st Dec., 23,779 590 1,426 24,493 172,907

27,640 56,894 24,140
do. 1st
1,128

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
Increase,..

2,001
2,830

1861. 1860.

Stock, 1st December, tons, 32,687 67,855
Boston,

8,629
Stock in New-York, 1st Jan., 1862, 21,264 tons, against, 1st Dec., 1861, 24,120 tons. Decrease, 2,856 tons, or 2 per cent. Add receipts in do.... 12,618

8,879
6,844

or 88
Philadelphia,
1,005

972 Increase,

33

or 3 Baltimore,

Total supply,

45,800 76,734
1,742

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

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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
1st December, 1861, 82,687
1st December, 1860, 67,855

35,168 or 52

March, 28,872 21,846
1st November,
35,182
1st November, 75,888
40,706 or 54

April, 28,060 24,857
1st October,
42,377
1st October,

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
1st July,
91,140
1st July,

88,169

Increase,
7,971
9

83,646 26,176
83,953
1st June,
65,673
18,280 or 29

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
81

14,206. 20,143
1st March,
42,823
1st March,
21,510
21,818 or 100

Dec.,

17,660

20,840 1st February, 46,825

1st February, 18,930

16

27,895 or 147
1st January,
1st January, 24,140

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

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