Memorials, Scientific and Literary, of Andrew Crosse, the ElectricianLongman, Brown, Green, Longmans, & Roberts, 1857 - 360 من الصفحات |
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مقاطع مشهورة
الصفحة 69 - There at the foot of yonder nodding beech That wreathes its old fantastic roots so high, His listless length at noontide would he stretch, And pore upon the brook that babbles by.
الصفحة 336 - On the twentysecond day these appearances were more elevated and distinct, and on the twenty-sixth day each figure assumed the form of a perfect insect, standing erect on a few bristles which formed its tail. Till this period...
الصفحة 115 - ... negative above, as the case may be : and this discharge may take place according to the laws of Electricity, through any or all of the surrounding zones, without influencing their respective Electricities otherwise than by weakening their force, by the removal of a portion of the electric fluid from the central nucleus above to that below : every successive flash, from the cloud to the earth, or from the earth to the cloud, weakening the charge of the plate of air, of which the cloud and the...
الصفحة 111 - I usually connect a large jar with the conductor, which increases the force of, and in some degree regulates the number of the explosions ; and the two balls between which the discharges pass can be easily regulated, as to their distance from each other, by a screw. After a certain number of explosions, say of negative Electricity, which at first may be nine or ten in a minute, a cessation occurs of some seconds or minutes, as the case may be, when about an equal number of explosions of positive...
الصفحة 113 - As the cloud passes onward, the opposite portions of the zones which first affected the wire come into play, and the effect is weakened with each successive pair till all dies away, and not enough electricity remains in the atmosphere to affect a gold-leaf electrometer. I have remarked that the air is remarkably free of electricity, at least more so than usual, both before and after the passage of one of these clouds. Sometimes a little previous to a storm, the gold leaves connected with the conductor...
الصفحة 49 - ... by reports as loud as those of a cannon. The battery is charged through the medium of a large brass ball, suspended from the ceiling immediately over it, and connected, by means of a long wire, with the conductor in the gallery ; this ball is raised from, and let down to the battery by means of a long silk cord, passing over a pulley in the ceiling : and thus this extraordinary electrician, while sitting calmly at his study table, views with philosophic satisfaction the wonderful powers of this...
الصفحة 107 - I walked the whole afternoon, exerting, at every step I went, a strong mental effort against the disease. " ' When I returned to the house I was decidedly better ; I was able to eat some dinner, and drank water as usual. The next morning the aching pain had gone down to my elbow, the following day it went down to the wrist, and the third day left me altogether.
الصفحة 51 - ... one uninterrupted stream of explosions, which died away and re-commenced with the opposite Electricity in equal violence. The stream of fire was too vivid to look at for any length of time, and the effect was most splendid, and continued without intermission, save that occasioned by the interchange of Electricities, for upwards of five hours, and then ceased totally.
الصفحة 50 - Many years since, I was sitting in my electrical room, on a dark November day, during a very dense driving fog and rain which had prevailed for many hours, sweeping over the earth, impelled by a south-west wind. The mercury in the barometer was low, and the thermometer indicated a low temperature. I had at this time 1,600 feet of wire insulated, which, crossing two small valleys, brought the electric fluid into my room.