Show PLAIN to daulat n i mile 14 qa inre nr e arnew or abw vol entering the office of the edison electric E light company in fifth avenue a reporter for ti alio a star a asked ak to see krofl professor sor thoin thoix thomas jas A ed r son all right sir said the secretary of the company mr esteon is al nvia ys very busy but lie will be glad to welcome a representative of tile pres press while the secretary was speaking a brisk little ili in an who ko had no coa coat t on but who wore a seedy looking beaver lint with tho the fur brushed tho the wrong way made liis his appearance in ill the office the tile professor sor gave the reporter a C cordial adial greeting and sud said nov now what do you wish me to ani talk k about today to day well pa picaso me tell me tile about the difficulties you have overcome your our im improvements in your lamps for lighting houses and streets in fact any id information that will be of interest i rest to the tile public said the reporter my dear sir it would fill a large book to describe all the difficulties I have experienced first and last but I will give you an all idea of what my associates and find I have accomplished and abat weare we anro doing we arc are making preparations to furnish lamps for lighting street stores and dwelling dwellings in a mile square of the city bounded by wall nassau and spruce streets and east stiver we have already made contracts for lights we have laid eight miles of street mains and will soon have fourteen miles completed the mains are coni composed posed of wires encased anc isad in iron iroil tubes our machines for generating electricity arc are bein being put tit up ill in a building c at pearl Pear ka street there arc are t twelve w elve machines and eight steam boilers with a powerful engine to run the machines t LIGHTS FOR STORES STORM A AND D DWELLINGS mr E edison d loon hopes to be read ready y to furnish light for stores dwelli dwellings ll 11 and streets within four months mont hs dynamo machines which convert the energy of motion into clec electrical trica i energy through the medium of magnetism are ire used there arc aro two kinds of these machines the tho one producing currents from fixed and permanent steel magnets and the other from electric magnets excited by the currents themselves generate the production of currents by these machines is is due to the simple fact that if a conductor such as a copper wire be moved rapidly through a magnetized space or a magnetic field as it called this conductor is electrified so that a current flos flows there is no disguising the fact that electricity can eo bo a it dangerous servant in ill tho the hands of the bar careless eless and ignorant in the tile hands odthe of the skilled it has bas less danger than gas oi 01 even oil the tile new now york board jbf of X fire ire underwriters have adopted tile fol following lorinc rules in regard to lights F first arst avi wires res to have 50 per cent cn t excess of conductivity above aboa hie the amount calculated as necessary for the number of lights to o be supplied by the wire second wires to bo be thoroughly insulated and doubly coated with somo soma approved materi al precautions or OF underwriters third all wires must be securely fastened by some approved fastening when it becomes necessary to carry wires wires through partitions and doors they must be secured against contact with metal or conduction substance in the manner approved by the inspector of the board fourth all lights must be protected by glass globes t at to effectually prevent sparks or particles of t the carbons from fallin falling from the lamps open liall lights ts arc are positively prohibited the conducting framework of chandeliers must be insulated and covered the same as wires F fifth fifth when electricity is conducted into a building a shutoff shut off must be placed at the point of ent ran rancito ceto each building and thesus the supply turned off when the lights arc are not in ill use these rules are very simple and are necessarily carried out by every qualified electrician but an tin additional dional security is obtained by mr E edison dison by inserting in every branch wire ft a safety catch 11 which is a short picco piece of lead wire that instantly melts if the strength of the current exceeds a certain degree thus stomping stopping ping the flow of electricity and niia pro producing safety many devices hayo livo been made for MEASURING THE electricity CONSUMED il in any place by ly electric lamps but mr edison claims that the tile device adopted by him is sufficiently simple and accurate for all practical purposes A glass glas cell contains two copper er plates inI immersed mersed in a solution of sulphate of copper a definite proportion of the current that passes through the house also passes through this cell and removes copper from one plate and deposits copper on another plate the weight of f copper deposited is an fill exact measure of the current used there ar ire e two such cells the one in charge of t ho lie consumer I and hie the other odthe of the supplier they just check each glicr taw m the incandescent light was bras first represented anted by lamps made from tom an all incandescent platinum wire but the practical workings of this lystel in were not satisfactory prin aay W cip cipully ay of tile a tiza tion and partial fusion of the wires and in apito of the nuni numerous erous improvements prove ments brought to bear on this system by mr baison they had bad to bo be rejected at least for ordinary lamps rien it was suggested to employ carbon which if not allowed to burn is infusible in the highest beat developed in lamps and diff diner lerent arrangements of apparatus were put together at nt diller ent times by kill king C swan sawyer and others somo some AVOIDING B by inclosing lamps in in receptacles where V lere a vacuum had been obtained others by filling those these receptacles with gabos gases unfit for combustion as is nil nitrogen rogen or oxide of carbon or simply by leaving the tile air shut up ill in the ITC receptacle to be vitiated by an incipient combustion all these attempts were but partially successful in ili 1879 tho the new n ew incandescent carbon lamp of mr editon edison edit on waa was announced noun ced and many savants savanis doubted trie exactness of tile allegations which were fiade the carbonized paper horseshoe horse borso shoe appealed appeared incapable of resisting mechanical shocks s and of supporting himan descents tor I adv any length of time mr edison did not cease ccase his endeavors deavors sto to perfect the lamp for practical ici til purposes As at present made tit these ce lamps are sufficiently solid and can lat a long time the original fragile carbon has become extremely nely clastic elastic and hard and of such attenuation that it can call well bo be coin pared in size to a horsehair by a tol cleverly verly combined system of fits fastening t ell tho the platinum conducting wires aio arc not exposed to be cut and ad tricy arc are so scaled in the glasa receiver that their c change lange of volume auder tile action of heat does not endanger tile perfection odthe of the vacuum r fibers i b C is of bamboo arc are now used instead of the tile paper origin originally ally employed N M caper I tar fab ath |