The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge, Volume 9Mitchell, Ames, and White, 1818 - Natural history |
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... turn the hour circle till the bubble comes right ; then turn the de- clination circle to 90 ° ; adjust the bubble by raising or depressing the polar axis ( first by hand , till it be nearly right , af- terwards tighten with an ivory key ...
... turn the hour circle till the bubble comes right ; then turn the de- clination circle to 90 ° ; adjust the bubble by raising or depressing the polar axis ( first by hand , till it be nearly right , af- terwards tighten with an ivory key ...
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... turn a wheel , p , by the teeth cut in its circum- ference ; this wheel is in the same piece with a cylindric barrel , H H , shown se- parately ( in fig . 4 , Plate II ) ; it has a great number of short pins stuck in it , which as it ...
... turn a wheel , p , by the teeth cut in its circum- ference ; this wheel is in the same piece with a cylindric barrel , H H , shown se- parately ( in fig . 4 , Plate II ) ; it has a great number of short pins stuck in it , which as it ...
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... turn on . bolts in one of the beams , G g , as centres , and are elevated or depressed by turning the nuts of two screws , h h , fixed to the tenon , and coming up through the top of the beams , Gg , upon which the nuts take their ...
... turn on . bolts in one of the beams , G g , as centres , and are elevated or depressed by turning the nuts of two screws , h h , fixed to the tenon , and coming up through the top of the beams , Gg , upon which the nuts take their ...
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The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an ... William Nicholson No preview available - 2015 |
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