tions per minute, employed in shaping some the wind chest. The pressure is carried down through of the steel parts of a sewing machine. The position ‘When depressed by the finger, it makes an electrical the hollow core and space surrounding the armature connection between the oscillating piece, A,… … and ope such magnet and attach- STALAGMITIC ACCRETION OF EMERY WHEEL DUST. the manual and for each pedal key. tery. Each of the other terminals of the magnets has its own wire which runs to the manual, each wire being sufficiently softened to cause them to stick together. own key. Hence, when a key…
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