AN EYE SPECULUM WITH DIFFERENT BLADES FOR UPPER AND LOWER LIDS

An Eye Speculum with Different Blades for Upper and Lower Lids.

A New Eye Speculum

sold by surgical instrument makers, which have constantly come prominently to my notice daring the performnace of operations on the eye, and which, after considerable experience of the same, have forced me to try and effect a remedy for them. It is with that object in view, that I have devised an instrument, which I venture to bring before the notice of the profession, as having, in my humble o...

Upper and lower bounds for numerical radii of block shifts

For an n-by-n complex matrix A in a block form with the (possibly) nonzero blocks only on the diagonal above the main one, we consider two other matrices whose nonzero entries are along the diagonal above the main one and consist of the norms or minimum moduli of the diagonal blocks of A. In this paper, we obtain two inequalities relating the numeical radii of these matrices and also determine ...

The first BSTS with different upper and lower chromatic numbers

In this paper the first BSTS in which the upper chromatic number is different from the lower chromatic number is determined. It is a BSTS(19) and its order is the lowest for which this property holds. In addition, all the possible strict colourings and their upper and lower chromatic number for systems of triples of the type BSTS(15), BSTS(19) and BSTS(21) are also determined.

Congenital ectropion of the upper lids.

This report of a case of congenital ectropion is presented not only because of its intrinsic interest and great rarity but also because, so far as one has been able to determine, it is the first case in which an attempt has been made to elucidate the aetiology of the condition by a detailed examination of the lids. Collins (1915) reported a case of a girl aged 4 months who had bilateral partial...