_Is the Sun getting Bigger?_--It is known that various speculations have been put forward as to the cause or source of the sun's heat. Among those who consider that it consists in the falling of asteroids or meteorites into the sun, is Mr. J. R. Mayer, of Heilbronn, who states that the surface of the sun measures 115,000 million square miles, and that the asteroids falling thereon form a mass every minute equal in weight to from 94,000 to 188,000 billion kilogrammes. It might be supposed that this enormous shower would increase the mass and weight of the sun, and by consequence produce an appreciable effect on the motion of the planets which compose our system. For instance, it would shorten our year by a second or something less. But the calculations of astronomers show that this effect does not take place; and Mr. Mayer states that to increase the apparent diameter of the sun a single second by the shower of asteroids would require from 33,000 to 66,000 years. _Teaching the Deaf and Dumb to Speak_.--Dr. Houdin, director of an institution for the deaf and dumb at Passy, lately announced to the French Academy, that after twenty-five years' experience he had proved the possibility of communicating the faculty of speech, in a certain degree, to deaf mutes. A commission appointed by the Academy and the Faculty to investigate the subject, reports that the learned doctor has really succeeded in several instances in teaching these unfortunate beings to speak and even comprehend spoken language so well that it is difficult to believe that they are not guided by the ear. The patients conversed with the members of the commission, and answered the different questions put to them. They were found to be perfectly familiar with the use and mechanism of speech, though destitute of the sense of hearing, and they comprehended what was said to them, reading the words upon the lips of the speaker with a marvellous facility. Thus they become fit to enter into society and capable of receiving all manner of instruction. But here is another case still more wonderful. What would you do if you had to instruct and prepare for first communion a child who was at the same time deaf, dumb, and _blind_? The case is not an imaginary one; it has occurred in an asylum for deaf-mutes at Notre Dame de Larnay, in the diocese of Poitiers. A nun was there charged with the instruction of a child in this unfortunate state, to whom she could appeal only by the sense of touch. Yet the child, who astonishes everybody by her sensibility and intelligence, has come by that means to a knowledge of the spiritual life, of God and his divine Son, of religion and its mysteries and precepts--has been prepared, in fine, for a worthy reception of the Eucharist. ART.