Dec., 1 8 8 4 . ]
Glimpsesof the Electrical Exhibition.
471
secured at one end to the handle, ~ and at the other end is perforated so as to permit the magnet core, C~ and its coil to pass through it. This metallic plate is securely attached at its upper edge to the edges of the magnetic diaphragm. I n this manner, as will be seen, the
FIG. 9.--Gray's Electro-magnetic Telephone (elevation).
opposite poles of the magnet are brought into close proximity with each other, and their magnetic effects greatly increased. T h e idea of thus connecting the diaphragm with the opposite pole of the magnet has been employed in a number of different telephones. I n Fig. 9 is shown the elevation of this form of speaking telephone. CE1WTR2J.L H I G ~ SCHOOL,
Philadelphia, Nov. 15, 1884.
ABNORMAL FLOWE•S.--A young botanist found, on the borders of forest, near Brussels, a poppy in w h i c h the four petals, by the union of their opposite edges, had become tubular; each presenting the appearance of a monopetalous infundibuliform corolla, giving the flower a strange bu~ somewhat elegant appearance. Transformations of leaves into tubular or vermiform organs are normal in some plants, such as the nepenthe, the sarracenia, etc., and accidental transformations are not uncommon. I n the vernaL;on of the poppy each petal is folded upon itself, in such a way that its lateral borders coincide throughout their whole length. I t is not then so astonishing that they should sometimes unite~ as that they unite so rarely. There is one cultiv~ated variety of poppy, thepapaver bracteatum, in which the petals are joined at their borders, so that the flower presents the appearance of a large cup.--JSa .5rature, May 24, 1884. C.