micrometer wheel wa amoved
by a milled edge hard rubber wheel of abo ,; •_« jpg
diameter. The micrometer screw an i wh. ei re
sponded so delicately and accurately
English Publication date 1917 publication_date QS:P577,+1917-00-00T00:00:00Z/9 Place of publication Chicago Authority file OCLC: 11022820 Source Internet