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hought occurred to me to listen to the telephones connected with the selenium receiver。 Mr。 Tainter saw me disappear from the window； and at once spoke to the transmitter。 I heard him distinctly say； 〃Mr。 Bell； if you hear what I say； come to the window and wave your hat！ 〃 It is needless to say with what gusto I obeyed。'
The spectroscope has demonstrated the truth of the poet； who said that 'light is the voice of the stars；' and we have it on the authority of Professor Bell and M。 Janssen； the celebrated astronomer； that the changing brightness of the photosphere； as produced by solar hurricanes； has produced a feeble echo in the photophone。
Pursuing these researches； Professor Bell discovered that not only the selenium cell； but simple discs of wood； glass； metal； ivory； india… rubber； and so on； yielded a distinct note when the intermittent ray of light fell upon them。 Crystals of sulphate of copper； chips of pine； and even tobacco…smoke； in a test…tube held before the beam； emitted a musical tone。 With a thin disc of vulcanite as receiver； the dark heat rays which pass through an opaque screen were found to yield a note。 Even the outer ear is itself a receiver； for when the intermittent beam is focussed in the cavity a faint musical tone is heard。
Another research of Professor Bell was that in which he undertook to localise the assassin's bullet in the body of the lamented President Garfield。 In 1879 Professor Hughes brought out his beautiful induction balance； and the following year Professor Bell； who had already worked in the same field； consulted him by telegraph as to the best mode of applying the balance to determining the place of the bullet； which had hitherto escaped the probes of the President's physicians。 Professor Hughes advised him by telegraph； and with this and other assistance an apparatus was devised which indicated the locality of the ball。 A full account of his experiments was given in a paper read before the American Association for the Advancement of Science in August； 1882。
Professor Bell continues to reside in the United States； of which he is a naturalised citizen。 He is married to a daughter of Mr。 Gardiner G。 Hubbard； who in 1860； when she was four years of age； lost her hearing by an illness； but has learned to converse by the Horace…Mann system of watching the lips。 Both he and his father…in…law （who had a pecuniary interest in his patents） have made princely fortunes by the introduction of the telephone。
CHAPTER IX。
THOMAS ALVA EDISON。
Thomas Alva Edison； the most famous inventor of his time and country； was born at Milan； Erie County； Ohio； in the United States； on February 11； 1847。 His pedigree has been traced for two centuries to a family of prosperous millers in Holland； some of whom emigrated to America in 1730。 Thomas； his great…grandfather； was an officer of a bank in Manhattan Island during the Revolution； and his signature is extant on the old notes of the American currency。 Longevity seems a characteristic of the strain； for Thomas lived to the patriarchal term of 102； his son to 103； and Samuel； the father of the inventor； is； we understand； a brisk and hale old man of eighty…six。
Born at Digby； in the county of Annapolis； Nova Scotia； on August 16； 1804； Samuel was apprenticed to a tailor； but in his manhood he forsook the needle to engage in the lumber trade； and afterwards in grain。 He resided for a time in Canada； where； at Vienna； he was married to Miss Nancy Elliott； a popular teacher in the high school。 She was of Scotch descent； and born in Chenango County； New York； on January 10； 1810。 After his marriage he removed； in 1837； to Detroit； Michigan； and the following year settled in Milan。
In his younger days Samuel Edison was a man of fine appearance。 He stood 6 feet 2 inches in his stockings； and even at the age of sixty… four he was known to outjump 260 soldiers of a regiment quartered at Fort Gratiot； in Michigan。 His wife was a fine…looking woman； intelligent； well…educated； and a social favourite。 The inventor probably draws his physical endurance from his father； and his intellect from his mother。
Milan is situated on the Huron River； about ten miles from the lake； and was then a rising town of 3；000 inhabitants； mostly occupied with the grain and timber trade。 Mr。 Edison dwelt in a plain cottage with a low fence in front； which stood beside the roadway under the shade of one or two trees。
The child was neither pale nor prematurely thoughtful； he was rosy… cheeked； laughing； and chubby。 He liked to ramble in the woods； or play on the banks of the river； and could repeat the songs of the boatmen ere he was five years old。 Still he was fond of building little roads with planks； and scooping out canals or caverns in the sand。
An amusing anecdote is imputed to his sister； Mrs。 Homer Page； of Milan。 Having been told one day that a goose hatches her goslings by the warmth of her body； the child was missed； and subsequently found in the barn curled up in a nest beside a quantity of eggs！
The Lake Shore Railway having injured the trade of Milan； the family removed to Port Huron； in Michigan； when Edison was about seven years old。 Here they lived in an old…fashioned white frame…house； surrounded by a grove； and commanding a fine view of the broad river； with the Canadian hills beyond。 His mother undertook his education； and with the exception of two months he never went to school。 She directed his opening mind to the acquisition of knowledge； and often read aloud to the family in the evening。 She and her son were a loving pair； and it is pleasant to know that although she died on April 9； 1871； before he finally emerged from his difficulties； her end was brightened by the first rays of his coming glory。
Mr。 Edison tells us that his son never had any boyhood in the ordinary sense； his early playthings being steam…engines and the mechanical powers。 But it is like enough that he trapped a wood…chuck now and then； or caught a white…fish with the rest。
He was greedy of knowledge； and by the age of ten had read the PENNY ENCYCLOPAEDIA； Hume's HISTORY OF ENGLAND； Dubigne's HISTORY OF THE REFORMATION； Gibbon's DECLINE AND FALL OF THE ROMAN EMPIRE； and Sears' HISTORY OF THE WORLD。 His father； we are told； encouraged his love of study by making him a small present for every book he read。
At the age of twelve he became a train…boy； or vendor of candy； fruit； and journals to the passengers on the Grand Trunk Railway； between Port Huron and Detroit。 The post enabled him to sleep at home； and to extend his reading by the public library at Detroit。 Like the boy Ampere； he proposed； it is said； to master the whole collection； shelf by shelf； and worked his way through fifteen feet of the bottom one before he began to select his fare。
Even the PRINCIPIA of Newton never daunted him； and if he did not understand the problems which have puzzled some of the greatest minds； he read them religiously； and pressed on。 Burton's ANATOMY OF MELANCHOLY； Ure's DICTIONARY OF CHEMISTRY； did not come amiss； but in Victor Hugo's LES MISERABLES and THE TOILERS OF THE SEA he found a treasure after his own heart。 Like Ampere