Amateur mechanics ... a book for old and young who like to make things .. (1907)
Popular mechanics magazine, Chicago. [from old catalog] · Chicago, Popular mechanics · leaf 27
will then be adjusted readyfor use. Connect the binding posts to a singlecell of battery—any kind will do as aslight current will answer. On enmplet-Ing the circuit the core will descend; or put in a switch or push button on oi ( the battery wires. If the button be con-cealed where the operator can… … HOW TO MAKE A NEW LANGUAGE Any one possessing a phonograph can trya very Interesting and amusing experimentwithout going to any expense. Remove the belt and replace with :i longer one. which can be made of narrow braid or a numbei of strands of yarn The new belt should be long enough to allow…
Handicraft · Amusements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-267-187.webp)
