Gaseous Spring. — Hone-shoes. — Mathematical Discovert/. 77 



formed upon the principle of Dr. WoUaston's scissors, used 

 for common purposes — with the edge so constructed as to ope- 

 rate like a knife. On this account, the instrument perforates 

 the coats of the eye with the utmost facility ; and when intro- 

 duced, the blades can be opened to a certain extent, so as to 

 cut the lens to pieces, without bruising it or any other part — 

 the necessary effect of scissors, as they are usually made. This 

 instrument possesses another advantage. The lens is supported 

 in its natural situation during the operation, by having one 

 blade behind, and the other before it ; so that it may be cut to 

 pieces, in situ,- and it remains afterwards forced by the shut 

 blades, into the anterior chamber, for dissolution. In this 

 way the operations of Saunders and Adams may be performed 

 with great effect, and without that necessity for repetition which 

 so often occurs when the common instruments are employed. 

 Dr. Gibson has made trials with the instrument, sufficient to 

 convince him of its decided superiority over every other used 

 for the same purpose. 



GASEOUS SPRING. 



About a quarter of a mile below the village of Milan, in the 

 state of Ohio, is a place just in the edge of the water of the 

 Huron river, where there is a constant current bubbling from 

 a niunber of places. These bubbles when touched with a lighted 

 candle or torch, burn with a beautiful clear and brilliant blaze. 

 There is gas enough issues to light the houses. — American 

 Pajier. 



IMPROVED HOUSE-SHOES. 



Col. Goldfinch, of Hythe, has obtained a patent for a new 

 method in the formation of horse-shoes. The improvement 

 consists in making the horse-shoe in two parts, or separating it 

 in two pieces, by cutting it through near the toe. The object 

 of the contrivance is, that the fiogs of the horse's hoof may 

 he enabled to expand and grow in a healthy state. The sepa- 

 ration is to be made in an indented form, and the two parts 

 fastened together by j)ins. It is furtlior ))roposcd to attach 

 the shoe to a liorsc's hoof by (hiving the nails obliquely, as in 

 the French niaiiiier of shoeing. For this purpose, (he situa- 

 tions of tlie nail-holes aie to be from about one third to half 

 the width of the shoe distant liuni its outer edge, and tending 

 in a slanting direction outwards. 



MATHEMATICAI, niSCOVERY. 



Mr. Ilerapath, ol' C'raiilonl, wlio lias iiitcly biconic known 

 bv liis phvjico-nialhemiilii.al wiilings <>n llu' ciiii^e and laws 



of 



