Page images
PDF
EPUB

The mixture, while boiling hot, is to be decomposed by a slight excess of muriatic acid, and the boiling continued till all the chlorine is driven off. On the cooling of the liquid the benzoic acid is deposited in crystals, which are but very slightly colored, the greater portion. of the coloring matter having been removed by the chlorine. The crystals, however, still retain some resinous matter, from which impurity they may be readily freed by being once or twice dissolved in a very small quantity of boiling water and recrystalized. A little purified animal charcoal may also be advantageously employed for this Lond. Edin. & Dublin Philos. Mag.

purpose.

On the Quantities of Rain received in gauges at unequal Elevations from the Ground. By Prof. PHILLIPS.

The author, referring to three Reports which he had already presented, observed that the results arrived at, on York Minster, on the Yorkshire Museum, and on the ground at York, for three years, appeared to require no repetition, and that the reasoning on the results having been generally accepted, he should have thought it unnecessary to recall attention to the subject, unless he had some new facts to communicate. On duly estimating the force of the objections which had been, or might have been, urged against the former experiments, such as the influence of local eddies and currents of wind about the Minster and Museum, and such buildings generally, Prof. Phillips resolved to establish a registration of gauges raised into the open air, to various heights, independent of buildings. He had carried on trials of this kind at intervals for more than five years, and after using globular gauges, and various modes of measuring the rain collected, he had finally employed for the last two years, funnel gauges, emptying themselves into reservoirs placed in the ground. Thus some particular difficulties were obviated, and a consistent tally of results obtained. In 1843, from January 9 to October 14, he had obtained registrations of the gauges almost continuously, and in 1844, a similar series from January 1 to September 2, was recorded for him by Mr. Cooke. The gauges are five in number, at 1, 3, 6, 12, and 24 French feet above the ground. The registration for the two periods are as under:

[blocks in formation]

On these facts the author forbore to comment, having the intention

to vary the experiments.

The EARL FITZWILLIAM observed, that although the quantities collected in the several gauges differed somewhat for the two years, yet it was remarkable that the proportions were much the same.

Proc. British Assoc.-London Athenæum.

On Simultaneous Barometrical Registration in the North of England. By Prof. PHILLIPS.

Following out a limited district in the plans of contemporaneous hourly registration, which had been prosecuted by Sir J. Herschel and M. Quetelet, for larger areas, the author found the means to combine observations on the barometer, attached thermometer and direction of wind, for twenty-four hours in each month, at nine stations in the north of England: viz. Kendal, Shields, Whitby, Scarborough, Hull, York, Sheffield, Birmingham, Manchester. The observations of five of these stations for six months, had been approximately discussed, viz. those of Shields, Hull, York, Sheffield, and Birmingham, and the results projected in diagrams. They showed, 1. the remarkable general accordance in the forming of the contemporaneous curves at all the stations. 2. The various limits of the deviations from uniformity, never amounting at any two stations to above onetwentieth of an inch. 3. The passage of waves of greater or less pressure in directions nearly corresponding to the path of the wind at the time, and with velocities which appear proportioned to the general movement of the atmosphere at the time, viz. twenty to forty miles an hour. (The author announced a further communication on this subject in 1845.)

Transit of Mercury.

Ibid.

TO THE COMMITTEE ON PUBLICATIONS OF THE JOURNAL OF THE FRANKLIN INSTITUTE.

Burlington, Vt., May 26, 1845.

Gentlemen, I attempted ascertaining the time of the late transit at this place as accurately as my imperfect means would allow. I ascertained the time of my watch on that day by eleven pairs of equal altitudes, corrected for the change of declination; none of which gave the time more than four or five seconds from the mean, and the greater part gave it within two seconds, although it was very windy. My telescope did not authorize me to notice the external contacts; the internal resulted as given below. I had no micrometer to estimate the diameter of the planet, or its distance from the limb.

Internal contact, beginning 11 h. 30 m. 11 s. A. M., mean time.
Do. do. ending 5 53 56

Yours, respectfully,

P. M.,

do.

JAMES A. DEAN.

[merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][merged small][merged small][merged small][ocr errors][merged small][ocr errors][merged small][merged small][merged small][ocr errors][ocr errors][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][ocr errors][merged small][ocr errors][merged small][merged small]

1. Combing and preparing wool, flax, &c.

LIST OF AMERICAN PATENTS, WITH REMARKS, &c.

October, 1841.

2. Pump for raising liquids,

3. Press for separating elaine and stearine,

4. Floating dry dock,

5. Improvement in mills,

6. Increasing friction of wheels, on rail roads, Elisha Tolles,

[merged small][ocr errors][merged small][merged small][merged small][merged small]
[blocks in formation]

ib.

Wm. A. Orcut,

ib.

John G. Tibbets,
William Davison,

67

ib.

ib.

Thomas Shepherd,
Lyman Gleason,

68

69

John Dutton,

ib.

14. Smut mill,

15. Propelling vessels,

16. Building vessels,

Lewis Greeve,
Daniel Fitzgerald,
Joseph Francis,

ib.

70

ib.

17. Sub-marine gun boat,

18. Doubling the motion of a crank shaft, .

Daniel Fitzgerald,

ib.

[blocks in formation]

19. Making lead pipes,

20. Ferules for canes,

21. Valves in steam engines,

22. Wire heddles,

23. Spiral water wheel,

24. Parlor stove,

[blocks in formation]
[blocks in formation]

Joseph Jones,
John Lee Chapman,
Richard Roberts,
Lansing E. Hopkins, .
Levi Bissell,
Ransselaer D. Granger,
Daniel Harrington,
N. P. Kingsley,
Levi L. Gowdy,

VOL. IX, 3RD SERIES. No. 6.-June, 1845.

[blocks in formation]

36

L. A. Stewart,

96

[merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small]

Charles G. Brown,

ib.

[blocks in formation]
[ocr errors]

104

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]
[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors]
« PreviousContinue »