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 38
he same manner as the head stock,except that thumb nuts are used on thecarriage bolts, thus allowing the tail stockto be shifted when necessary. The mech-anism of the center holder is obtained byusing a i^-in. pipe, A, and a ^-in. lock nut,B, embedded in the wood. I found that a wooden tool rest… … An electroscope for detecting electrifiedbodies can be made out of a piece of notepaper, a cork, and a needle. Push the nee-dle in the cork,and cut the pa-per in the shapeof a small ar-row. Balance thearrow on theneedle as shownin the sketch,and the instru-ment will thenbe complete. If a piece of…
Handicraft · Amusements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-96-37.webp)
