Dear Sir,—Allow me to offer you some memoranda, which I made at Headingley, near Leeds, on the 7th of May last, respecting a hailstorm which visited several parts of England on that day. It appears that it arrived at Newark about 5 o’clock P. M., and was succeeded by a tornado which did much damage; then, pursuing a N. N. Westerly direction it reached Wakefield at 6.41. The hail continued to fall till about 6. 58. The afternoon at Headingley had been remarkably hot and close, and the atmosphere densely charged with vapour; at 6. 45 the sky had become so overspread with dark clouds that it was impossible to see anything within doors without artificial light.