| Show fine flito altire I A wilmington lon star reporter has been shown at a a macbane eshop shop in that city a collection of gauges how accurate arc are these was ashod of the foreman of tho the department did you ever feel of the ten thousandth part ot of an inch in chho he asked the reporter who replied to tho effect that ho he had never even seen heard tasted or smelt the ten thousandth part of an inch tho the foreman with a smile turned to a small machine it is thor ethically eti cally simp lebut exquisite in workmanship mau ship in a email small horizontal and perfectly level iron dramn work is adjusted a horizon horizontal tal sel scie e v which carries one jaw of a small vice the other jaw aw boing fixed the screw has ten tell threads to the inch it is obvious therefore that one turn of the screw will alter tho the distance between the jaws of tho the little vica vice just the one tenth of an inch the head of the screw is a circular steel plate abou four inched in diameter the circumference of or which ia is graduated into equal divisions turning the bead head of the a screw through the extent of one of t these hese divisions advances tho the screw tho the one hundredth part of a revolution and consequently alters the distance between the jaws just tho the one cne hun dreith I part of an inch the finer adjustment is made by a vernier affixed to the head of the ter w which is so graduated that the turning of the head until a divia division of the scale upon its epee ence coincides with the nearest division vision on the vernier scale advances the screw the thousandth one part of a revolution and winds or contracts the space between the jaws of tho the little vice virjust vic just the tho ten thousand th martof part of aninch an inch A the craw screw cannot be mado abs true there is an ingenious a ata ta climent ciment for correcting the infinitesimally minute error in ill its working and ana as a change of a few degree degre ein i in the temperature pera ture of the of the gauge to be tested would effect the nicety of the operation the m schine iq i adjusted for a temperature of 75 degree and the trials are made with t the he gau gauge g e at tho the same temperature adjusting A dj t in I g tho the vice jaws at 10 of an inch moro more than two inches apart the foreman handed the re reporter bporter a two inch galage and told h him m to pass it carefully and slowly between them left te to itself the guage fell frowly of its own weight through the space but when mad to descend slowly a perceptible pull was left from each jaw analogous to the pulling power of two small magnets n ts the tho foreman gave the bead head of the screw sc row an almost imperceptible touch bakir g it coincide with the vernier tho the guage would no longer pass through it filled the space between the jaws exactly that touch had brought those jaws nearer together bajus lomoth part obart of an inch the following advertisement appeared eared in a new york daily recently F y and was answered by about young men wanted experienc ed bands hands on ladies waists 11 t o |
