2 from thiose of hiis trade in Eturope. He first took my altitude bv a quLadrant, and then with rule and compasses described -the dimensions and outlines of nmy whole body, all of wlhich he enteredi u'pon paper; and in six days brought my clothes very ill-made, and quite oUt of shape, by7 happening to mistake a figure in the calctulation. But my comfort was, that I observed such accidents very frequent, and little regarded." The moral of this is obvious. Though it may not be necessary for an

more »

... tlhalmic surgeon to have a quadrant, rule, and compasses, among his instruments, we must endeavour to gauge the size of the lens to be extracted and make our section of sufficient size to allow of its exit with a minimum of damage to the parts involved. The tusual error is for the section to he too small, and it is of smcll comfort, at the m)oment of finding our section to be of intsufficient size, to think of the number of our colleagues wvho have been landed in the same plight throtugh an error in calculation.