ree and duration of the re- American Made Telescopes. tard is controlled by the degree of pressure applied to the The perfection of workmanship attained by American key. A positive hold on the key produces a ‘‘ hold” on the opticians in making telescopes and microscopes has often tone. A positive… … exhibitors of implements and machinery have applied for upon the piano, the soft and loud pedals not only being space, some two hundred and fifty more than at Bristol last acted upon on the music sheet, but the variety of touch year. The sheds for these exhibits would form a line three required for…
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