Note 26 — INQUIRIES ON THE CAUSES OF THE COLOR OF THE WATER OF THE RHINE.[24]

In the number of the magazine in which this note appeared was an article by "E. L." on the perforation of a leaden pipe by rats, upon which, in a subsequent number (Vol. vii., p. 592), J. R. notes as follows: "E. S. has been, surely, too inattentive to proportions: there is an inconsistency in the dimensions of a leaden pipe about 1¼ in. in external diameter, with a bore of about ¾ in. in diameter; thus leaving a solid circumference of metal varying from ½ in. to ¾ in. in thickness.—J. R., Sept. 1834."—Ed.