Show results of a new discovery men who make a new discovery in science are the themselves melves little aware of the vast results which may follow the fact is aptly illustrated by professor assor J D dana iti ili the following extract from one of liis his celear cited addresses which we find in the american journal of education lAbout fo arty five years vears years after the twitching of G alvanis frog the thi time of blossom and fruit came and such euch a succession of benefits from nature never before afore descend descended ea upon th the klob globe e in ili any one tf teil thil ii years in 1837 professor Profess br morse one of our own number already setting up his telegraph by bril gi 91 n ng into its construction the tile well veil known principle 1 l of the electro magnet and galvanic battery md now telegraphic ili til reads aio alo ng which thought travels with almost the speed of light are enveloping a large part dart of the tile globe about tile the same tinie the fact of a ee ce position position of copper from copper salt became a productive principle it was found that copper could thus be deposited over an engraved plate and a perfect copy made of every line and dot the hap py though soon developed into a anew new art that of electrotyping A single engraved plate could thus be indefinite indefinitely lT multiplied and tile the original naf remain unhurt but the art was not confined to this thia purpose alone books till tile tiie then D had been stereotyped by making a plaster cast of a surface tf of a page set ili in type and then taking cast of tile the lead in the plaster now they take tile the first cast in wax cover its surface s with powdered black lead and carry it to the galvanic battery then it t soon comes out a cast of the page iti ia copper far more perfect than the oil old stereotypes more ex expeditiously edi edl made and more durable dunable the bible hou Hoa housein seln sein seln new york ii liow ilow full of electrotypes electro types they scarcely print from anything else the fine wood ell eli engravings graviD gs so profusely adorning some of the tract house publications and many other illustrated works and magazines of the day are printed from electrotypes electro types alone thustle thus the great al art of bookmaking book making and therefore the world of mind mir mii d and all that thai tha is sacred as well yell as secular are reaping results from a science that germinated first jn in that queer queen little pile of volta which in the opinion of the economist of its time was of no do earthly use to anybody but if type tyee tind eind engraved platea pI atea and woodcuts wood cuts caf in ay be copied why not copy other things in the he same way in faett fact the process is used for the production reproduction re of works r of art and thus immense est manufacture medals bronze statutes and statuettes and bas in a stad of great beauty anu ana an perfection and lat ili moderate od cost colst shortly after the first electrotypes electro types were made it was observed that the deposition of silver or gold through galvanism on copper and some bome other metals served as a convenient t mode of plating Dr and today to day nearly all the silvering and gilding t on metal required by the thi arts is done by electroplating bli AlI minutes now stand for in the old regime some years ago it was thought if electro mag netiam could move the machinery machin ry of the telegraph and mark down or print off passing thought on paper it would also register the beats of a pendulum or if so willed it would repeat the beats beata of any one clock all over the he land wherever it was sent along wires for the purpose and already in some cities they are beginning begin hing bing to distribute and sell time BS as they do gas one single it im 1 the town as one gas establishment m e dt aig lights I 1 11 it t at marsailles they are this very year putting time pieces thus fed into all the lamps of the I lump limp amp posts along the public streets may be at as well as day to our own country belongs the tile honor of this application appi appl cation catlon of science at this frio ment the astronomical trono mical clock at camb idge beats time in all ill the railroad depots at bohton boston and arid but a few weeks since the dudley observatory at albany proposed to in supply aply tile the city of new york with time the tile observatory drawing upon the stars for their supply the the astronomer has other higher uses for the subtle agent for fur lie he makes it hla his private secretary requiting it to register on paper the time of his observations and help map ot off the heavens if a strip of a paper has a straight and uniform motion P and as it moves con cra just touches the point of a sta pen or pencil a mark is made on the tile paper which obviously would be twice as long for two seconds as for one and so on oil if then for every second a mark an inch long we were remade raade every inch would represent a second thus seconds may actually be converted into feet and time may ba be measured by the tile yard stick or with a delicate delic s te scale a second may be subdivided sub divided into ten len tenths ahr and hundredths of 01 a second this si simple T I 1 rie nie and ingenious idea the astronomer applies to his purpose by means onla oa clock and a telegraphic apparatus arid and now instead of counting the iha ticks of his clock he touches his key at tit the he moment of a transit or other events ili in the heavens this makes a check on the paper and EO so marks die the precise time even to a minute fraction of a second the tiie observations thus made are not only vastly vasily more accurate than those on tile the old butman may follow one ii with In incredible I 1 e ra rapidity P so that in one night more work can be I 1 clone cione done dona than before in ili a ft month this invention tha the work mainly of america american minds by which electromagnetism electro magnetism has become the astronomers most faithful assistant IS now introduced into some of the bost host observatories of europe the difference of longitude between points over this tin s continent and between greenwich and the observatories of europe has been ascertained by the same earns means and like accuracy this too was an all american suggestion and when th the t telegraph e I 1 I 1 graph wires now in progress are ald laid aid across th the A atlantic lia lla antie the difference of longitude between washingto u lind and greenwich will be as exactly known an own who mho imagined fifty years since that the galvanic galya galva ale aie fluid would helg help us ils measure dista distance noa noe on the earth and that tile the geographer would hav have cause to bless the lightning as well as the stars W with I 1 th equal facility this agent has been adapted as I 1 have llave said to tile the fire alarms of a city where employed one man may strike rilas every bell beli in in the i city though miles apart at the same instant stant and a slight movement of the fi finger nger is all the power he exerts at one tap the ringing begins begin and it continues without further effort at tile tho same time too instantaneous notices of the place of fire may be sent sept to eve every iy ay engine house the same agent is playing IA a xing ying the errand boy in tile th e hotels displacing ille the brazen tongued gers thal thai were regularly kept on file in the office A all ali I 1 these and more results might be added are from that unforeseen force which galvani galvan and volta were the tho farsi first oil on record to recognize |