Open main menu

Page:Popular Science Monthly Volume 90.djvu/396

This page needs to be proofread.


New Kinks and New Tools Which Have Been

��Below: The "sucker" prin- ciple utilized in gripping weights. After creating a vac- uum the hollow rubber cups stick tightly to the weight

���Below; A screw- driver which is pivoted to its handle. It can be used in the usual straight position or in the "T" position, as illustrated

��AIR PASSAGE

��Feeling the pulse of steel with a hollow rod, on one end of which a meter is fitted to gage the temperature. When the dial needle touches a red mark the critical point has been reached

����A valve and cock which not only controls the amount of gas but the amount of air feed to a stove

��� �