The New American Cyclopaedia: A Popular Dictionary of General Knowledge, 15권Appleton, 1871 |
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... acid , and they are then bleached and beaten for market . To bleach sponges , the finest and softest are selected , washed several times in water , and immersed in very dilute hydro- chloric acid to dissolve out the calcareous mat- ters ...
... acid , and they are then bleached and beaten for market . To bleach sponges , the finest and softest are selected , washed several times in water , and immersed in very dilute hydro- chloric acid to dissolve out the calcareous mat- ters ...
11 페이지
... ACID , GAS , PETROLEUM , and SALT . SPRING , in astronomy , one of the 4 seasons of the year , commencing for the northern hemi- sphere at the time of the vernal equinox , or on March 21 , and ending at the time of the sum- mer solstice ...
... ACID , GAS , PETROLEUM , and SALT . SPRING , in astronomy , one of the 4 seasons of the year , commencing for the northern hemi- sphere at the time of the vernal equinox , or on March 21 , and ending at the time of the sum- mer solstice ...
12 페이지
... hardening and tempering it is restored . It thus seems probable that the elas- ticity resides in the thin blue oxidized surface . The removal of the blue tint from a pendulum spring by its immersion in weak acid was found by 12 SPRING.
... hardening and tempering it is restored . It thus seems probable that the elas- ticity resides in the thin blue oxidized surface . The removal of the blue tint from a pendulum spring by its immersion in weak acid was found by 12 SPRING.
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A Popular Dictionary of General Knowledge. spring by its immersion in weak acid was found by Mr. Dent to impair its elasticity , causing the chronometer to lose nearly a minute each hour ; and a second and equal immersion scarcely caused ...
A Popular Dictionary of General Knowledge. spring by its immersion in weak acid was found by Mr. Dent to impair its elasticity , causing the chronometer to lose nearly a minute each hour ; and a second and equal immersion scarcely caused ...
36 페이지
... acid hastens this change . Starch is insoluble in alcohol and ether . In its commercial form it is aggluti- nated in columnar masses , which are easily re- duced to powder . It is without smell or taste , and when pressed in the fingers ...
... acid hastens this change . Starch is insoluble in alcohol and ether . In its commercial form it is aggluti- nated in columnar masses , which are easily re- duced to powder . It is without smell or taste , and when pressed in the fingers ...
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