cording to the science of meteorology, have terminated in a destructive tornado, similar to some of those in tropical climates, instead of a severe gale as it was called. The second extremity of Jan. 19th has not yet been noticed in any of the public prints where meteorological observations have been made as I have seen, although it is one of more rare occurrence in this section of country than the former. Let the observation of the 19th January be reduced to tide level, the height of the barometric column would have been 30.934 inches, which is a greater height or rise of the barometer than is to be found registered among any of the meteorological observations of former years in the United States— that is, when compared by the standard. In order to adopt this meteorological observation to any scientific purpose, it is necessary to know how the barometer I used compared with an accurate standard, (a mountain barometer.) By comparing it with one of Newman's standard barometers of London, at Columbia, College, the result was thus: For capilary attraction, 0.036 of an inch, which, if added to the above tide level observation, would amount to 30.97 inches, the true height of the barometer on the 19th of January. Now if this observation has been made correctly, it is evident by experiment that the atmospheric pressure or weight on this part of the earth's surface, at the level of the sea at that time, was equal to the weight of an ocean of quicksilver 30.97 inches deep. 6. COMMUNICATION FROM JOEL W. ANDREWS, Of Albany, on sUNDRY BAROMETRICAL OBSERVATIONS MADE BY HIM IN 1850, FROM ALBANY TO MOUNT WASHINGTON AND RETURNING, RECEIVED FEBRUARY 1851. DR. T. R. BECK, Albany, January 15, 1851. Secretary of the Regents of the University, S. N. Y. Sir,--In the month of July last I made a journey from this city to the White Mountains in the State of New Hampshire, for the pur pose of taking barometric observations to ascertain the elevation of • Mount Washington and several other sections of the country in that direction, above the level of the sea. When I undertook it I had no idea that the results of my observations would ever be considered worthy of public notice, or even be called for publication. Soon after my return, I was requested to present a report of my observations to Professor Ebenezer Emmons, for his examination, which I did in the month of September following. After he had examined them to his satisfaction, he laid them before Professor Hopkins of Williams College; his opinion and statement I will give hereafter. In the month of November, Professor Emmons thought proper to forward the same to Professor Silliman of New Haven, for publication in his journal, which he did in his last number for January, 1851. I made a full report in detail upon the manner and plan of taking my barometric observations in order to give as satisfactory results as possible. A short time after I had got my report completed, I came across Dr. Jackson's barometric observations of Mount Washington in 1840, as given in his geological survey of New Hampshire. By comparing our results together, I found that the difference was so great that in case I should interfere with his measurement, there might be objections against publishing them, therefore I did not give my report in full, only the barometric heights of the different stations and the sum of the whole without any additional explanation of the difference between the two results. I will now give you my report in full for your examination, to make such use of as you may think proper. I left Albany, No. 42 High street, one hundred feet above tide water in the Hudson river, on the 25th of July, by stage, for the White Mountains; I took with me a mountain barometer of the following description: Calibre of the tube 0.29 of an inch, glass cistern and zero point to adjust the level of the mercury at each ob servation, attached thermometer let into the instrument and covered with glass to equalize the temperature. By comparing it with one of Newman's standard barometers at Columbia College, the difference was thus for capilary attraction 0.035 inch less than the standard. I will here remark that as these observations were not intended in the first place for public use, it will be perceived by the following tabulation a number of observations have been omitted; for instance there should have been one taken on leaving the Connecticut river before leaving for Littleton: and again, another should have been taken at the White Mountain House before I left on my return to Littleton, which would have given me double observations to and from the Connecticut river. I consider it equally important to ascertain the grade of the rivers, as I do the elevation of table-lands or mountains from which they flow; and also the upper limit of several kinds of vegetation should have been particularly noticed, the boiling point by the thermometer and several other experiments on atmospheric density, &c., I might have performed to advantage, in case I had intended my experiments for publication. BAROMETRIC OBSERVATIONS from Albany to the White Mountains, by stage. 100 feet above tide water in Hudson river, weather fair Stage tavern, on the ground. Post-office, on the ground, about three-quarters of a mile [from the summit level of the Foot of the Green Mountain, west side. [Queechy river. Level of White and Connecticut rivers. About half way up the mountain, in ever green woods, |